20354620

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{647}}^1$

素因数の和:691

約数の個数: 72

約数和(自身を含む): 50676192

約数和(自身を除く): 30321572

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 110, 121, 130, 143, 220, 242, 260, 286, 484, 572, 605, 647, 715, 1210, 1294, 1430, 1573, 2420, 2588, 2860, 3146, 3235, 6292, 6470, 7117, 7865, 8411, 12940, 14234, 15730, 16822, 28468, 31460, 33644, 35585, 42055, 71170, 78287, 84110, 92521, 142340, 156574, 168220, 185042, 313148, 370084, 391435, 462605, 782870, 925210, 1017731, 1565740, 1850420, 2035462, 4070924, 5088655, 10177310, 20354620]

約数ペア:

[(1, 20354620), (2, 10177310), (4, 5088655), (5, 4070924), (10, 2035462), (11, 1850420), (13, 1565740), (20, 1017731), (22, 925210), (26, 782870), (44, 462605), (52, 391435), (55, 370084), (65, 313148), (110, 185042), (121, 168220), (130, 156574), (143, 142340), (220, 92521), (242, 84110), (260, 78287), (286, 71170), (484, 42055), (572, 35585), (605, 33644), (647, 31460), (715, 28468), (1210, 16822), (1294, 15730), (1430, 14234), (1573, 12940), (2420, 8411), (2588, 7865), (2860, 7117), (3146, 6470), (3235, 6292)]