20639416

素因数分解:

$2^3\times 7^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{179}}^1$

素因数の和:292

約数の個数: 64

約数和(自身を含む): 46656000

約数和(自身を除く): 26016584

約数列:

[1, 2, 4, 7, 8, 14, 28, 29, 56, 58, 71, 116, 142, 179, 203, 232, 284, 358, 406, 497, 568, 716, 812, 994, 1253, 1432, 1624, 1988, 2059, 2506, 3976, 4118, 5012, 5191, 8236, 10024, 10382, 12709, 14413, 16472, 20764, 25418, 28826, 36337, 41528, 50836, 57652, 72674, 88963, 101672, 115304, 145348, 177926, 290696, 355852, 368561, 711704, 737122, 1474244, 2579927, 2948488, 5159854, 10319708, 20639416]

約数ペア:

[(1, 20639416), (2, 10319708), (4, 5159854), (7, 2948488), (8, 2579927), (14, 1474244), (28, 737122), (29, 711704), (56, 368561), (58, 355852), (71, 290696), (116, 177926), (142, 145348), (179, 115304), (203, 101672), (232, 88963), (284, 72674), (358, 57652), (406, 50836), (497, 41528), (568, 36337), (716, 28826), (812, 25418), (994, 20764), (1253, 16472), (1432, 14413), (1624, 12709), (1988, 10382), (2059, 10024), (2506, 8236), (3976, 5191), (4118, 5012)]