21999880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{78571}}^1$

素因数の和:78589

約数の個数: 32

約数和(自身を含む): 56571840

約数和(自身を除く): 34571960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 78571, 157142, 314284, 392855, 549997, 628568, 785710, 1099994, 1571420, 2199988, 2749985, 3142840, 4399976, 5499970, 10999940, 21999880]

約数ペア:

[(1, 21999880), (2, 10999940), (4, 5499970), (5, 4399976), (7, 3142840), (8, 2749985), (10, 2199988), (14, 1571420), (20, 1099994), (28, 785710), (35, 628568), (40, 549997), (56, 392855), (70, 314284), (140, 157142), (280, 78571)]