20991636

素因数分解:

$2^2\times 3^4\times {\mathrm{67}}^1\times {\mathrm{967}}^1$

素因数の和:1050

約数の個数: 60

約数和(自身を含む): 55752928

約数和(自身を除く): 34761292

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 67, 81, 108, 134, 162, 201, 268, 324, 402, 603, 804, 967, 1206, 1809, 1934, 2412, 2901, 3618, 3868, 5427, 5802, 7236, 8703, 10854, 11604, 17406, 21708, 26109, 34812, 52218, 64789, 78327, 104436, 129578, 156654, 194367, 259156, 313308, 388734, 583101, 777468, 1166202, 1749303, 2332404, 3498606, 5247909, 6997212, 10495818, 20991636]

約数ペア:

[(1, 20991636), (2, 10495818), (3, 6997212), (4, 5247909), (6, 3498606), (9, 2332404), (12, 1749303), (18, 1166202), (27, 777468), (36, 583101), (54, 388734), (67, 313308), (81, 259156), (108, 194367), (134, 156654), (162, 129578), (201, 104436), (268, 78327), (324, 64789), (402, 52218), (603, 34812), (804, 26109), (967, 21708), (1206, 17406), (1809, 11604), (1934, 10854), (2412, 8703), (2901, 7236), (3618, 5802), (3868, 5427)]