21354080

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^2\times {\mathrm{1103}}^1$

素因数の和:1140

約数の個数: 72

約数和(自身を含む): 55502496

約数和(自身を除く): 34148416

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 121, 160, 176, 220, 242, 352, 440, 484, 605, 880, 968, 1103, 1210, 1760, 1936, 2206, 2420, 3872, 4412, 4840, 5515, 8824, 9680, 11030, 12133, 17648, 19360, 22060, 24266, 35296, 44120, 48532, 60665, 88240, 97064, 121330, 133463, 176480, 194128, 242660, 266926, 388256, 485320, 533852, 667315, 970640, 1067704, 1334630, 1941280, 2135408, 2669260, 4270816, 5338520, 10677040, 21354080]

約数ペア:

[(1, 21354080), (2, 10677040), (4, 5338520), (5, 4270816), (8, 2669260), (10, 2135408), (11, 1941280), (16, 1334630), (20, 1067704), (22, 970640), (32, 667315), (40, 533852), (44, 485320), (55, 388256), (80, 266926), (88, 242660), (110, 194128), (121, 176480), (160, 133463), (176, 121330), (220, 97064), (242, 88240), (352, 60665), (440, 48532), (484, 44120), (605, 35296), (880, 24266), (968, 22060), (1103, 19360), (1210, 17648), (1760, 12133), (1936, 11030), (2206, 9680), (2420, 8824), (3872, 5515), (4412, 4840)]