21087780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{59}}^1$

素因数の和:138

約数の個数: 192

約数和(自身を含む): 73543680

約数和(自身を除く): 52455900

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 23, 28, 30, 35, 37, 42, 46, 59, 60, 69, 70, 74, 84, 92, 105, 111, 115, 118, 138, 140, 148, 161, 177, 185, 210, 222, 230, 236, 259, 276, 295, 322, 345, 354, 370, 413, 420, 444, 460, 483, 518, 555, 590, 644, 690, 708, 740, 777, 805, 826, 851, 885, 966, 1036, 1110, 1180, 1239, 1295, 1357, 1380, 1554, 1610, 1652, 1702, 1770, 1932, 2065, 2183, 2220, 2415, 2478, 2553, 2590, 2714, 3108, 3220, 3404, 3540, 3885, 4071, 4130, 4255, 4366, 4830, 4956, 5106, 5180, 5428, 5957, 6195, 6549, 6785, 7770, 8142, 8260, 8510, 8732, 9499, 9660, 10212, 10915, 11914, 12390, 12765, 13098, 13570, 15281, 15540, 16284, 17020, 17871, 18998, 20355, 21830, 23828, 24780, 25530, 26196, 27140, 28497, 29785, 30562, 32745, 35742, 37996, 40710, 43660, 45843, 47495, 50209, 51060, 56994, 59570, 61124, 65490, 71484, 76405, 81420, 89355, 91686, 94990, 100418, 113988, 119140, 130980, 142485, 150627, 152810, 178710, 183372, 189980, 200836, 229215, 251045, 284970, 301254, 305620, 351463, 357420, 458430, 502090, 569940, 602508, 702926, 753135, 916860, 1004180, 1054389, 1405852, 1506270, 1757315, 2108778, 3012540, 3514630, 4217556, 5271945, 7029260, 10543890, 21087780]

約数ペア:

[(1, 21087780), (2, 10543890), (3, 7029260), (4, 5271945), (5, 4217556), (6, 3514630), (7, 3012540), (10, 2108778), (12, 1757315), (14, 1506270), (15, 1405852), (20, 1054389), (21, 1004180), (23, 916860), (28, 753135), (30, 702926), (35, 602508), (37, 569940), (42, 502090), (46, 458430), (59, 357420), (60, 351463), (69, 305620), (70, 301254), (74, 284970), (84, 251045), (92, 229215), (105, 200836), (111, 189980), (115, 183372), (118, 178710), (138, 152810), (140, 150627), (148, 142485), (161, 130980), (177, 119140), (185, 113988), (210, 100418), (222, 94990), (230, 91686), (236, 89355), (259, 81420), (276, 76405), (295, 71484), (322, 65490), (345, 61124), (354, 59570), (370, 56994), (413, 51060), (420, 50209), (444, 47495), (460, 45843), (483, 43660), (518, 40710), (555, 37996), (590, 35742), (644, 32745), (690, 30562), (708, 29785), (740, 28497), (777, 27140), (805, 26196), (826, 25530), (851, 24780), (885, 23828), (966, 21830), (1036, 20355), (1110, 18998), (1180, 17871), (1239, 17020), (1295, 16284), (1357, 15540), (1380, 15281), (1554, 13570), (1610, 13098), (1652, 12765), (1702, 12390), (1770, 11914), (1932, 10915), (2065, 10212), (2183, 9660), (2220, 9499), (2415, 8732), (2478, 8510), (2553, 8260), (2590, 8142), (2714, 7770), (3108, 6785), (3220, 6549), (3404, 6195), (3540, 5957), (3885, 5428), (4071, 5180), (4130, 5106), (4255, 4956), (4366, 4830)]