21990676

素因数分解:

$2^2\times {\mathrm{19}}^2\times {\mathrm{97}}^1\times {\mathrm{157}}^1$

素因数の和:296

約数の個数: 36

約数和(自身を含む): 41295828

約数和(自身を除く): 19305152

約数列:

[1, 2, 4, 19, 38, 76, 97, 157, 194, 314, 361, 388, 628, 722, 1444, 1843, 2983, 3686, 5966, 7372, 11932, 15229, 30458, 35017, 56677, 60916, 70034, 113354, 140068, 226708, 289351, 578702, 1157404, 5497669, 10995338, 21990676]

約数ペア:

[(1, 21990676), (2, 10995338), (4, 5497669), (19, 1157404), (38, 578702), (76, 289351), (97, 226708), (157, 140068), (194, 113354), (314, 70034), (361, 60916), (388, 56677), (628, 35017), (722, 30458), (1444, 15229), (1843, 11932), (2983, 7372), (3686, 5966)]