21387210

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1$

素因数の和:144

約数の個数: 128

約数和(自身を含む): 59996160

約数和(自身を除く): 38608950

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 29, 30, 31, 39, 58, 61, 62, 65, 78, 87, 93, 122, 130, 145, 155, 174, 183, 186, 195, 290, 305, 310, 366, 377, 390, 403, 435, 465, 610, 754, 793, 806, 870, 899, 915, 930, 1131, 1209, 1586, 1769, 1798, 1830, 1885, 1891, 2015, 2262, 2379, 2418, 2697, 3538, 3770, 3782, 3965, 4030, 4495, 4758, 5307, 5394, 5655, 5673, 6045, 7930, 8845, 8990, 9455, 10614, 11310, 11346, 11687, 11895, 12090, 13485, 17690, 18910, 22997, 23374, 23790, 24583, 26535, 26970, 28365, 35061, 45994, 49166, 53070, 54839, 56730, 58435, 68991, 70122, 73749, 109678, 114985, 116870, 122915, 137982, 147498, 164517, 175305, 229970, 245830, 274195, 329034, 344955, 350610, 368745, 548390, 689910, 712907, 737490, 822585, 1425814, 1645170, 2138721, 3564535, 4277442, 7129070, 10693605, 21387210]

約数ペア:

[(1, 21387210), (2, 10693605), (3, 7129070), (5, 4277442), (6, 3564535), (10, 2138721), (13, 1645170), (15, 1425814), (26, 822585), (29, 737490), (30, 712907), (31, 689910), (39, 548390), (58, 368745), (61, 350610), (62, 344955), (65, 329034), (78, 274195), (87, 245830), (93, 229970), (122, 175305), (130, 164517), (145, 147498), (155, 137982), (174, 122915), (183, 116870), (186, 114985), (195, 109678), (290, 73749), (305, 70122), (310, 68991), (366, 58435), (377, 56730), (390, 54839), (403, 53070), (435, 49166), (465, 45994), (610, 35061), (754, 28365), (793, 26970), (806, 26535), (870, 24583), (899, 23790), (915, 23374), (930, 22997), (1131, 18910), (1209, 17690), (1586, 13485), (1769, 12090), (1798, 11895), (1830, 11687), (1885, 11346), (1891, 11310), (2015, 10614), (2262, 9455), (2379, 8990), (2418, 8845), (2697, 7930), (3538, 6045), (3770, 5673), (3782, 5655), (3965, 5394), (4030, 5307), (4495, 4758)]