81064240

素因数分解:

$2^4\times 5^1\times {\mathrm{619}}^1\times {\mathrm{1637}}^1$

素因数の和:2269

約数の個数: 40

約数和(自身を含む): 188894160

約数和(自身を除く): 107829920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 619, 1238, 1637, 2476, 3095, 3274, 4952, 6190, 6548, 8185, 9904, 12380, 13096, 16370, 24760, 26192, 32740, 49520, 65480, 130960, 1013303, 2026606, 4053212, 5066515, 8106424, 10133030, 16212848, 20266060, 40532120, 81064240]

約数ペア:

[(1, 81064240), (2, 40532120), (4, 20266060), (5, 16212848), (8, 10133030), (10, 8106424), (16, 5066515), (20, 4053212), (40, 2026606), (80, 1013303), (619, 130960), (1238, 65480), (1637, 49520), (2476, 32740), (3095, 26192), (3274, 24760), (4952, 16370), (6190, 13096), (6548, 12380), (8185, 9904)]