21993916

素因数分解:

$2^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1\times {\mathrm{163}}^1$

素因数の和:314

約数の個数: 48

約数和(自身を含む): 45552640

約数和(自身を除く): 23558724

約数列:

[1, 2, 4, 7, 14, 28, 61, 79, 122, 158, 163, 244, 316, 326, 427, 553, 652, 854, 1106, 1141, 1708, 2212, 2282, 4564, 4819, 9638, 9943, 12877, 19276, 19886, 25754, 33733, 39772, 51508, 67466, 69601, 90139, 134932, 139202, 180278, 278404, 360556, 785497, 1570994, 3141988, 5498479, 10996958, 21993916]

約数ペア:

[(1, 21993916), (2, 10996958), (4, 5498479), (7, 3141988), (14, 1570994), (28, 785497), (61, 360556), (79, 278404), (122, 180278), (158, 139202), (163, 134932), (244, 90139), (316, 69601), (326, 67466), (427, 51508), (553, 39772), (652, 33733), (854, 25754), (1106, 19886), (1141, 19276), (1708, 12877), (2212, 9943), (2282, 9638), (4564, 4819)]