648257980

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{531359}}^1$

素因数の和:531429

約数の個数: 24

約数和(自身を含む): 1383661440

約数和(自身を除く): 735403460

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 531359, 1062718, 2125436, 2656795, 5313590, 10627180, 32412899, 64825798, 129651596, 162064495, 324128990, 648257980]

約数ペア:

[(1, 648257980), (2, 324128990), (4, 162064495), (5, 129651596), (10, 64825798), (20, 32412899), (61, 10627180), (122, 5313590), (244, 2656795), (305, 2125436), (610, 1062718), (1220, 531359)]