21290800

素因数分解:

$2^4\times 5^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1$

素因数の和:167

約数の個数: 120

約数和(自身を含む): 56460672

約数和(自身を除く): 35169872

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 25, 31, 34, 40, 50, 62, 68, 80, 85, 100, 101, 124, 136, 155, 170, 200, 202, 248, 272, 310, 340, 400, 404, 425, 496, 505, 527, 620, 680, 775, 808, 850, 1010, 1054, 1240, 1360, 1550, 1616, 1700, 1717, 2020, 2108, 2480, 2525, 2635, 3100, 3131, 3400, 3434, 4040, 4216, 5050, 5270, 6200, 6262, 6800, 6868, 8080, 8432, 8585, 10100, 10540, 12400, 12524, 13175, 13736, 15655, 17170, 20200, 21080, 25048, 26350, 27472, 31310, 34340, 40400, 42160, 42925, 50096, 52700, 53227, 62620, 68680, 78275, 85850, 105400, 106454, 125240, 137360, 156550, 171700, 210800, 212908, 250480, 266135, 313100, 343400, 425816, 532270, 626200, 686800, 851632, 1064540, 1252400, 1330675, 2129080, 2661350, 4258160, 5322700, 10645400, 21290800]

約数ペア:

[(1, 21290800), (2, 10645400), (4, 5322700), (5, 4258160), (8, 2661350), (10, 2129080), (16, 1330675), (17, 1252400), (20, 1064540), (25, 851632), (31, 686800), (34, 626200), (40, 532270), (50, 425816), (62, 343400), (68, 313100), (80, 266135), (85, 250480), (100, 212908), (101, 210800), (124, 171700), (136, 156550), (155, 137360), (170, 125240), (200, 106454), (202, 105400), (248, 85850), (272, 78275), (310, 68680), (340, 62620), (400, 53227), (404, 52700), (425, 50096), (496, 42925), (505, 42160), (527, 40400), (620, 34340), (680, 31310), (775, 27472), (808, 26350), (850, 25048), (1010, 21080), (1054, 20200), (1240, 17170), (1360, 15655), (1550, 13736), (1616, 13175), (1700, 12524), (1717, 12400), (2020, 10540), (2108, 10100), (2480, 8585), (2525, 8432), (2635, 8080), (3100, 6868), (3131, 6800), (3400, 6262), (3434, 6200), (4040, 5270), (4216, 5050)]