21145360

素因数分解:

$2^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{2617}}^1$

素因数の和:2731

約数の個数: 40

約数和(自身を含む): 49668696

約数和(自身を除く): 28523336

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 101, 202, 404, 505, 808, 1010, 1616, 2020, 2617, 4040, 5234, 8080, 10468, 13085, 20936, 26170, 41872, 52340, 104680, 209360, 264317, 528634, 1057268, 1321585, 2114536, 2643170, 4229072, 5286340, 10572680, 21145360]

約数ペア:

[(1, 21145360), (2, 10572680), (4, 5286340), (5, 4229072), (8, 2643170), (10, 2114536), (16, 1321585), (20, 1057268), (40, 528634), (80, 264317), (101, 209360), (202, 104680), (404, 52340), (505, 41872), (808, 26170), (1010, 20936), (1616, 13085), (2020, 10468), (2617, 8080), (4040, 5234)]