720243880

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{253607}}^1$

素因数の和:253689

約数の個数: 32

約数和(自身を含む): 1643379840

約数和(自身を除く): 923135960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 253607, 507214, 1014428, 1268035, 2028856, 2536070, 5072140, 10144280, 18006097, 36012194, 72024388, 90030485, 144048776, 180060970, 360121940, 720243880]

約数ペア:

[(1, 720243880), (2, 360121940), (4, 180060970), (5, 144048776), (8, 90030485), (10, 72024388), (20, 36012194), (40, 18006097), (71, 10144280), (142, 5072140), (284, 2536070), (355, 2028856), (568, 1268035), (710, 1014428), (1420, 507214), (2840, 253607)]