20281380

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{1123}}^1$

素因数の和:1185

約数の個数: 96

約数和(自身を含む): 66468864

約数和(自身を除く): 46187484

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 43, 60, 70, 84, 86, 105, 129, 140, 172, 210, 215, 258, 301, 420, 430, 516, 602, 645, 860, 903, 1123, 1204, 1290, 1505, 1806, 2246, 2580, 3010, 3369, 3612, 4492, 4515, 5615, 6020, 6738, 7861, 9030, 11230, 13476, 15722, 16845, 18060, 22460, 23583, 31444, 33690, 39305, 47166, 48289, 67380, 78610, 94332, 96578, 117915, 144867, 157220, 193156, 235830, 241445, 289734, 338023, 471660, 482890, 579468, 676046, 724335, 965780, 1014069, 1352092, 1448670, 1690115, 2028138, 2897340, 3380230, 4056276, 5070345, 6760460, 10140690, 20281380]

約数ペア:

[(1, 20281380), (2, 10140690), (3, 6760460), (4, 5070345), (5, 4056276), (6, 3380230), (7, 2897340), (10, 2028138), (12, 1690115), (14, 1448670), (15, 1352092), (20, 1014069), (21, 965780), (28, 724335), (30, 676046), (35, 579468), (42, 482890), (43, 471660), (60, 338023), (70, 289734), (84, 241445), (86, 235830), (105, 193156), (129, 157220), (140, 144867), (172, 117915), (210, 96578), (215, 94332), (258, 78610), (301, 67380), (420, 48289), (430, 47166), (516, 39305), (602, 33690), (645, 31444), (860, 23583), (903, 22460), (1123, 18060), (1204, 16845), (1290, 15722), (1505, 13476), (1806, 11230), (2246, 9030), (2580, 7861), (3010, 6738), (3369, 6020), (3612, 5615), (4492, 4515)]