397381640

素因数分解:

$2^3\times 5^1\times {\mathrm{1553}}^1\times {\mathrm{6397}}^1$

素因数の和:7961

約数の個数: 32

約数和(自身を含む): 894824280

約数和(自身を除く): 497442640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1553, 3106, 6212, 6397, 7765, 12424, 12794, 15530, 25588, 31060, 31985, 51176, 62120, 63970, 127940, 255880, 9934541, 19869082, 39738164, 49672705, 79476328, 99345410, 198690820, 397381640]

約数ペア:

[(1, 397381640), (2, 198690820), (4, 99345410), (5, 79476328), (8, 49672705), (10, 39738164), (20, 19869082), (40, 9934541), (1553, 255880), (3106, 127940), (6212, 63970), (6397, 62120), (7765, 51176), (12424, 31985), (12794, 31060), (15530, 25588)]