21346480

素因数分解:

$2^4\times 5^1\times {\mathrm{163}}^1\times {\mathrm{1637}}^1$

素因数の和:1813

約数の個数: 40

約数和(自身を含む): 49965552

約数和(自身を除く): 28619072

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 163, 326, 652, 815, 1304, 1630, 1637, 2608, 3260, 3274, 6520, 6548, 8185, 13040, 13096, 16370, 26192, 32740, 65480, 130960, 266831, 533662, 1067324, 1334155, 2134648, 2668310, 4269296, 5336620, 10673240, 21346480]

約数ペア:

[(1, 21346480), (2, 10673240), (4, 5336620), (5, 4269296), (8, 2668310), (10, 2134648), (16, 1334155), (20, 1067324), (40, 533662), (80, 266831), (163, 130960), (326, 65480), (652, 32740), (815, 26192), (1304, 16370), (1630, 13096), (1637, 13040), (2608, 8185), (3260, 6548), (3274, 6520)]