21461860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{3739}}^1$

素因数の和:3796

約数の個数: 48

約数和(自身を含む): 52778880

約数和(自身を除く): 31317020

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 41, 70, 82, 140, 164, 205, 287, 410, 574, 820, 1148, 1435, 2870, 3739, 5740, 7478, 14956, 18695, 26173, 37390, 52346, 74780, 104692, 130865, 153299, 261730, 306598, 523460, 613196, 766495, 1073093, 1532990, 2146186, 3065980, 4292372, 5365465, 10730930, 21461860]

約数ペア:

[(1, 21461860), (2, 10730930), (4, 5365465), (5, 4292372), (7, 3065980), (10, 2146186), (14, 1532990), (20, 1073093), (28, 766495), (35, 613196), (41, 523460), (70, 306598), (82, 261730), (140, 153299), (164, 130865), (205, 104692), (287, 74780), (410, 52346), (574, 37390), (820, 26173), (1148, 18695), (1435, 14956), (2870, 7478), (3739, 5740)]