21673880

素因数分解:

$2^3\times 5^1\times {\mathrm{331}}^1\times {\mathrm{1637}}^1$

素因数の和:1979

約数の個数: 32

約数和(自身を含む): 48943440

約数和(自身を除く): 27269560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 331, 662, 1324, 1637, 1655, 2648, 3274, 3310, 6548, 6620, 8185, 13096, 13240, 16370, 32740, 65480, 541847, 1083694, 2167388, 2709235, 4334776, 5418470, 10836940, 21673880]

約数ペア:

[(1, 21673880), (2, 10836940), (4, 5418470), (5, 4334776), (8, 2709235), (10, 2167388), (20, 1083694), (40, 541847), (331, 65480), (662, 32740), (1324, 16370), (1637, 13240), (1655, 13096), (2648, 8185), (3274, 6620), (3310, 6548)]