21073640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{1031}}^1$

素因数の和:1122

約数の個数: 64

約数和(自身を含む): 54984960

約数和(自身を除く): 33911320

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 73, 140, 146, 280, 292, 365, 511, 584, 730, 1022, 1031, 1460, 2044, 2062, 2555, 2920, 4088, 4124, 5110, 5155, 7217, 8248, 10220, 10310, 14434, 20440, 20620, 28868, 36085, 41240, 57736, 72170, 75263, 144340, 150526, 288680, 301052, 376315, 526841, 602104, 752630, 1053682, 1505260, 2107364, 2634205, 3010520, 4214728, 5268410, 10536820, 21073640]

約数ペア:

[(1, 21073640), (2, 10536820), (4, 5268410), (5, 4214728), (7, 3010520), (8, 2634205), (10, 2107364), (14, 1505260), (20, 1053682), (28, 752630), (35, 602104), (40, 526841), (56, 376315), (70, 301052), (73, 288680), (140, 150526), (146, 144340), (280, 75263), (292, 72170), (365, 57736), (511, 41240), (584, 36085), (730, 28868), (1022, 20620), (1031, 20440), (1460, 14434), (2044, 10310), (2062, 10220), (2555, 8248), (2920, 7217), (4088, 5155), (4124, 5110)]