21978020010

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{149}}^1\times {\mathrm{80603}}^1$

素因数の和:80823

約数の個数: 64

約数和(自身を含む): 53972438400

約数和(自身を除く): 31994418390

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 61, 122, 149, 183, 298, 305, 366, 447, 610, 745, 894, 915, 1490, 1830, 2235, 4470, 9089, 18178, 27267, 45445, 54534, 80603, 90890, 136335, 161206, 241809, 272670, 403015, 483618, 806030, 1209045, 2418090, 4916783, 9833566, 12009847, 14750349, 24019694, 24583915, 29500698, 36029541, 49167830, 60049235, 72059082, 73751745, 120098470, 147503490, 180147705, 360295410, 732600667, 1465201334, 2197802001, 3663003335, 4395604002, 7326006670, 10989010005, 21978020010]

約数ペア:

[(1, 21978020010), (2, 10989010005), (3, 7326006670), (5, 4395604002), (6, 3663003335), (10, 2197802001), (15, 1465201334), (30, 732600667), (61, 360295410), (122, 180147705), (149, 147503490), (183, 120098470), (298, 73751745), (305, 72059082), (366, 60049235), (447, 49167830), (610, 36029541), (745, 29500698), (894, 24583915), (915, 24019694), (1490, 14750349), (1830, 12009847), (2235, 9833566), (4470, 4916783), (9089, 2418090), (18178, 1209045), (27267, 806030), (45445, 483618), (54534, 403015), (80603, 272670), (90890, 241809), (136335, 161206)]