20963560

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{5189}}^1$

素因数の和:5301

約数の個数: 32

約数和(自身を含む): 47644200

約数和(自身を除く): 26680640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 5189, 10378, 20756, 25945, 41512, 51890, 103780, 207560, 524089, 1048178, 2096356, 2620445, 4192712, 5240890, 10481780, 20963560]

約数ペア:

[(1, 20963560), (2, 10481780), (4, 5240890), (5, 4192712), (8, 2620445), (10, 2096356), (20, 1048178), (40, 524089), (101, 207560), (202, 103780), (404, 51890), (505, 41512), (808, 25945), (1010, 20756), (2020, 10378), (4040, 5189)]