21415760

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{113}}^1$

素因数の和:252

約数の個数: 80

約数和(自身を含む): 52925184

約数和(自身を除く): 31509424

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 92, 103, 113, 115, 184, 206, 226, 230, 368, 412, 452, 460, 515, 565, 824, 904, 920, 1030, 1130, 1648, 1808, 1840, 2060, 2260, 2369, 2599, 4120, 4520, 4738, 5198, 8240, 9040, 9476, 10396, 11639, 11845, 12995, 18952, 20792, 23278, 23690, 25990, 37904, 41584, 46556, 47380, 51980, 58195, 93112, 94760, 103960, 116390, 186224, 189520, 207920, 232780, 267697, 465560, 535394, 931120, 1070788, 1338485, 2141576, 2676970, 4283152, 5353940, 10707880, 21415760]

約数ペア:

[(1, 21415760), (2, 10707880), (4, 5353940), (5, 4283152), (8, 2676970), (10, 2141576), (16, 1338485), (20, 1070788), (23, 931120), (40, 535394), (46, 465560), (80, 267697), (92, 232780), (103, 207920), (113, 189520), (115, 186224), (184, 116390), (206, 103960), (226, 94760), (230, 93112), (368, 58195), (412, 51980), (452, 47380), (460, 46556), (515, 41584), (565, 37904), (824, 25990), (904, 23690), (920, 23278), (1030, 20792), (1130, 18952), (1648, 12995), (1808, 11845), (1840, 11639), (2060, 10396), (2260, 9476), (2369, 9040), (2599, 8240), (4120, 5198), (4520, 4738)]