20671420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{433}}^1$

素因数の和:491

約数の個数: 96

約数和(自身を含む): 55996416

約数和(自身を除く): 35324996

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 31, 35, 44, 55, 62, 70, 77, 110, 124, 140, 154, 155, 217, 220, 308, 310, 341, 385, 433, 434, 620, 682, 770, 866, 868, 1085, 1364, 1540, 1705, 1732, 2165, 2170, 2387, 3031, 3410, 4330, 4340, 4763, 4774, 6062, 6820, 8660, 9526, 9548, 11935, 12124, 13423, 15155, 19052, 23815, 23870, 26846, 30310, 33341, 47630, 47740, 53692, 60620, 66682, 67115, 93961, 95260, 133364, 134230, 147653, 166705, 187922, 268460, 295306, 333410, 375844, 469805, 590612, 666820, 738265, 939610, 1033571, 1476530, 1879220, 2067142, 2953060, 4134284, 5167855, 10335710, 20671420]

約数ペア:

[(1, 20671420), (2, 10335710), (4, 5167855), (5, 4134284), (7, 2953060), (10, 2067142), (11, 1879220), (14, 1476530), (20, 1033571), (22, 939610), (28, 738265), (31, 666820), (35, 590612), (44, 469805), (55, 375844), (62, 333410), (70, 295306), (77, 268460), (110, 187922), (124, 166705), (140, 147653), (154, 134230), (155, 133364), (217, 95260), (220, 93961), (308, 67115), (310, 66682), (341, 60620), (385, 53692), (433, 47740), (434, 47630), (620, 33341), (682, 30310), (770, 26846), (866, 23870), (868, 23815), (1085, 19052), (1364, 15155), (1540, 13423), (1705, 12124), (1732, 11935), (2165, 9548), (2170, 9526), (2387, 8660), (3031, 6820), (3410, 6062), (4330, 4774), (4340, 4763)]