20475208

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{313}}^1$

素因数の和:386

約数の個数: 64

約数和(自身を含む): 45102960

約数和(自身を除く): 24627752

約数列:

[1, 2, 4, 8, 13, 17, 26, 34, 37, 52, 68, 74, 104, 136, 148, 221, 296, 313, 442, 481, 626, 629, 884, 962, 1252, 1258, 1768, 1924, 2504, 2516, 3848, 4069, 5032, 5321, 8138, 8177, 10642, 11581, 16276, 16354, 21284, 23162, 32552, 32708, 42568, 46324, 65416, 69173, 92648, 138346, 150553, 196877, 276692, 301106, 393754, 553384, 602212, 787508, 1204424, 1575016, 2559401, 5118802, 10237604, 20475208]

約数ペア:

[(1, 20475208), (2, 10237604), (4, 5118802), (8, 2559401), (13, 1575016), (17, 1204424), (26, 787508), (34, 602212), (37, 553384), (52, 393754), (68, 301106), (74, 276692), (104, 196877), (136, 150553), (148, 138346), (221, 92648), (296, 69173), (313, 65416), (442, 46324), (481, 42568), (626, 32708), (629, 32552), (884, 23162), (962, 21284), (1252, 16354), (1258, 16276), (1768, 11581), (1924, 10642), (2504, 8177), (2516, 8138), (3848, 5321), (4069, 5032)]