21315680

素因数分解:

$2^5\times 5^1\times {\mathrm{127}}^1\times {\mathrm{1049}}^1$

素因数の和:1191

約数の個数: 48

約数和(自身を含む): 50803200

約数和(自身を除く): 29487520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 127, 160, 254, 508, 635, 1016, 1049, 1270, 2032, 2098, 2540, 4064, 4196, 5080, 5245, 8392, 10160, 10490, 16784, 20320, 20980, 33568, 41960, 83920, 133223, 167840, 266446, 532892, 666115, 1065784, 1332230, 2131568, 2664460, 4263136, 5328920, 10657840, 21315680]

約数ペア:

[(1, 21315680), (2, 10657840), (4, 5328920), (5, 4263136), (8, 2664460), (10, 2131568), (16, 1332230), (20, 1065784), (32, 666115), (40, 532892), (80, 266446), (127, 167840), (160, 133223), (254, 83920), (508, 41960), (635, 33568), (1016, 20980), (1049, 20320), (1270, 16784), (2032, 10490), (2098, 10160), (2540, 8392), (4064, 5245), (4196, 5080)]