20640620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1031}}^1$

素因数の和:1071

約数の個数: 96

約数和(自身を含む): 58254336

約数和(自身を除く): 37613716

約数列:

[1, 2, 4, 5, 7, 10, 11, 13, 14, 20, 22, 26, 28, 35, 44, 52, 55, 65, 70, 77, 91, 110, 130, 140, 143, 154, 182, 220, 260, 286, 308, 364, 385, 455, 572, 715, 770, 910, 1001, 1031, 1430, 1540, 1820, 2002, 2062, 2860, 4004, 4124, 5005, 5155, 7217, 10010, 10310, 11341, 13403, 14434, 20020, 20620, 22682, 26806, 28868, 36085, 45364, 53612, 56705, 67015, 72170, 79387, 93821, 113410, 134030, 144340, 147433, 158774, 187642, 226820, 268060, 294866, 317548, 375284, 396935, 469105, 589732, 737165, 793870, 938210, 1032031, 1474330, 1587740, 1876420, 2064062, 2948660, 4128124, 5160155, 10320310, 20640620]

約数ペア:

[(1, 20640620), (2, 10320310), (4, 5160155), (5, 4128124), (7, 2948660), (10, 2064062), (11, 1876420), (13, 1587740), (14, 1474330), (20, 1032031), (22, 938210), (26, 793870), (28, 737165), (35, 589732), (44, 469105), (52, 396935), (55, 375284), (65, 317548), (70, 294866), (77, 268060), (91, 226820), (110, 187642), (130, 158774), (140, 147433), (143, 144340), (154, 134030), (182, 113410), (220, 93821), (260, 79387), (286, 72170), (308, 67015), (364, 56705), (385, 53612), (455, 45364), (572, 36085), (715, 28868), (770, 26806), (910, 22682), (1001, 20620), (1031, 20020), (1430, 14434), (1540, 13403), (1820, 11341), (2002, 10310), (2062, 10010), (2860, 7217), (4004, 5155), (4124, 5005)]