21358740

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{197}}^1$

素因数の和:361

約数の個数: 96

約数和(自身を含む): 65197440

約数和(自身を除く): 43838700

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 139, 156, 195, 197, 260, 278, 390, 394, 417, 556, 591, 695, 780, 788, 834, 985, 1182, 1390, 1668, 1807, 1970, 2085, 2364, 2561, 2780, 2955, 3614, 3940, 4170, 5122, 5421, 5910, 7228, 7683, 8340, 9035, 10244, 10842, 11820, 12805, 15366, 18070, 21684, 25610, 27105, 27383, 30732, 36140, 38415, 51220, 54210, 54766, 76830, 82149, 108420, 109532, 136915, 153660, 164298, 273830, 328596, 355979, 410745, 547660, 711958, 821490, 1067937, 1423916, 1642980, 1779895, 2135874, 3559790, 4271748, 5339685, 7119580, 10679370, 21358740]

約数ペア:

[(1, 21358740), (2, 10679370), (3, 7119580), (4, 5339685), (5, 4271748), (6, 3559790), (10, 2135874), (12, 1779895), (13, 1642980), (15, 1423916), (20, 1067937), (26, 821490), (30, 711958), (39, 547660), (52, 410745), (60, 355979), (65, 328596), (78, 273830), (130, 164298), (139, 153660), (156, 136915), (195, 109532), (197, 108420), (260, 82149), (278, 76830), (390, 54766), (394, 54210), (417, 51220), (556, 38415), (591, 36140), (695, 30732), (780, 27383), (788, 27105), (834, 25610), (985, 21684), (1182, 18070), (1390, 15366), (1668, 12805), (1807, 11820), (1970, 10842), (2085, 10244), (2364, 9035), (2561, 8340), (2780, 7683), (2955, 7228), (3614, 5910), (3940, 5421), (4170, 5122)]