21997640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{251}}^1\times {\mathrm{313}}^1$

素因数の和:582

約数の個数: 64

約数和(自身を含む): 56972160

約数和(自身を除く): 34974520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 251, 280, 313, 502, 626, 1004, 1252, 1255, 1565, 1757, 2008, 2191, 2504, 2510, 3130, 3514, 4382, 5020, 6260, 7028, 8764, 8785, 10040, 10955, 12520, 14056, 17528, 17570, 21910, 35140, 43820, 70280, 78563, 87640, 157126, 314252, 392815, 549941, 628504, 785630, 1099882, 1571260, 2199764, 2749705, 3142520, 4399528, 5499410, 10998820, 21997640]

約数ペア:

[(1, 21997640), (2, 10998820), (4, 5499410), (5, 4399528), (7, 3142520), (8, 2749705), (10, 2199764), (14, 1571260), (20, 1099882), (28, 785630), (35, 628504), (40, 549941), (56, 392815), (70, 314252), (140, 157126), (251, 87640), (280, 78563), (313, 70280), (502, 43820), (626, 35140), (1004, 21910), (1252, 17570), (1255, 17528), (1565, 14056), (1757, 12520), (2008, 10955), (2191, 10040), (2504, 8785), (2510, 8764), (3130, 7028), (3514, 6260), (4382, 5020)]