20466280

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{163}}^1$

素因数の和:290

約数の個数: 64

約数和(自身を含む): 48058560

約数和(自身を除く): 27592280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 73, 86, 146, 163, 172, 215, 292, 326, 344, 365, 430, 584, 652, 730, 815, 860, 1304, 1460, 1630, 1720, 2920, 3139, 3260, 6278, 6520, 7009, 11899, 12556, 14018, 15695, 23798, 25112, 28036, 31390, 35045, 47596, 56072, 59495, 62780, 70090, 95192, 118990, 125560, 140180, 237980, 280360, 475960, 511657, 1023314, 2046628, 2558285, 4093256, 5116570, 10233140, 20466280]

約数ペア:

[(1, 20466280), (2, 10233140), (4, 5116570), (5, 4093256), (8, 2558285), (10, 2046628), (20, 1023314), (40, 511657), (43, 475960), (73, 280360), (86, 237980), (146, 140180), (163, 125560), (172, 118990), (215, 95192), (292, 70090), (326, 62780), (344, 59495), (365, 56072), (430, 47596), (584, 35045), (652, 31390), (730, 28036), (815, 25112), (860, 23798), (1304, 15695), (1460, 14018), (1630, 12556), (1720, 11899), (2920, 7009), (3139, 6520), (3260, 6278)]