20697068

素因数分解:

$2^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{359}}^1$

素因数の和:470

約数の個数: 48

約数和(自身を含む): 43545600

約数和(自身を除く): 22848532

約数列:

[1, 2, 4, 7, 14, 28, 29, 58, 71, 116, 142, 203, 284, 359, 406, 497, 718, 812, 994, 1436, 1988, 2059, 2513, 4118, 5026, 8236, 10052, 10411, 14413, 20822, 25489, 28826, 41644, 50978, 57652, 72877, 101956, 145754, 178423, 291508, 356846, 713692, 739181, 1478362, 2956724, 5174267, 10348534, 20697068]

約数ペア:

[(1, 20697068), (2, 10348534), (4, 5174267), (7, 2956724), (14, 1478362), (28, 739181), (29, 713692), (58, 356846), (71, 291508), (116, 178423), (142, 145754), (203, 101956), (284, 72877), (359, 57652), (406, 50978), (497, 41644), (718, 28826), (812, 25489), (994, 20822), (1436, 14413), (1988, 10411), (2059, 10052), (2513, 8236), (4118, 5026)]