21728714

素因数分解:

$2^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{109}}^1\times {\mathrm{491}}^1$

素因数の和:638

約数の個数: 32

約数和(自身を含む): 38966400

約数和(自身を除く): 17237686

約数列:

[1, 2, 7, 14, 29, 58, 109, 203, 218, 406, 491, 763, 982, 1526, 3161, 3437, 6322, 6874, 14239, 22127, 28478, 44254, 53519, 99673, 107038, 199346, 374633, 749266, 1552051, 3104102, 10864357, 21728714]

約数ペア:

[(1, 21728714), (2, 10864357), (7, 3104102), (14, 1552051), (29, 749266), (58, 374633), (109, 199346), (203, 107038), (218, 99673), (406, 53519), (491, 44254), (763, 28478), (982, 22127), (1526, 14239), (3161, 6874), (3437, 6322)]