21666260

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{1279}}^1$

素因数の和:1317

約数の個数: 72

約数和(自身を含む): 57200640

約数和(自身を除く): 35534380

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 121, 140, 154, 220, 242, 308, 385, 484, 605, 770, 847, 1210, 1279, 1540, 1694, 2420, 2558, 3388, 4235, 5116, 6395, 8470, 8953, 12790, 14069, 16940, 17906, 25580, 28138, 35812, 44765, 56276, 70345, 89530, 98483, 140690, 154759, 179060, 196966, 281380, 309518, 393932, 492415, 619036, 773795, 984830, 1083313, 1547590, 1969660, 2166626, 3095180, 4333252, 5416565, 10833130, 21666260]

約数ペア:

[(1, 21666260), (2, 10833130), (4, 5416565), (5, 4333252), (7, 3095180), (10, 2166626), (11, 1969660), (14, 1547590), (20, 1083313), (22, 984830), (28, 773795), (35, 619036), (44, 492415), (55, 393932), (70, 309518), (77, 281380), (110, 196966), (121, 179060), (140, 154759), (154, 140690), (220, 98483), (242, 89530), (308, 70345), (385, 56276), (484, 44765), (605, 35812), (770, 28138), (847, 25580), (1210, 17906), (1279, 16940), (1540, 14069), (1694, 12790), (2420, 8953), (2558, 8470), (3388, 6395), (4235, 5116)]