21431280

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{6869}}^1$

素因数の和:6898

約数の個数: 80

約数和(自身を含む): 71557920

約数和(自身を除く): 50126640

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 39, 40, 48, 52, 60, 65, 78, 80, 104, 120, 130, 156, 195, 208, 240, 260, 312, 390, 520, 624, 780, 1040, 1560, 3120, 6869, 13738, 20607, 27476, 34345, 41214, 54952, 68690, 82428, 89297, 103035, 109904, 137380, 164856, 178594, 206070, 267891, 274760, 329712, 357188, 412140, 446485, 535782, 549520, 714376, 824280, 892970, 1071564, 1339455, 1428752, 1648560, 1785940, 2143128, 2678910, 3571880, 4286256, 5357820, 7143760, 10715640, 21431280]

約数ペア:

[(1, 21431280), (2, 10715640), (3, 7143760), (4, 5357820), (5, 4286256), (6, 3571880), (8, 2678910), (10, 2143128), (12, 1785940), (13, 1648560), (15, 1428752), (16, 1339455), (20, 1071564), (24, 892970), (26, 824280), (30, 714376), (39, 549520), (40, 535782), (48, 446485), (52, 412140), (60, 357188), (65, 329712), (78, 274760), (80, 267891), (104, 206070), (120, 178594), (130, 164856), (156, 137380), (195, 109904), (208, 103035), (240, 89297), (260, 82428), (312, 68690), (390, 54952), (520, 41214), (624, 34345), (780, 27476), (1040, 20607), (1560, 13738), (3120, 6869)]