21186620

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{1663}}^1$

素因数の和:1699

約数の個数: 72

約数和(自身を含む): 55770624

約数和(自身を除く): 34584004

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 140, 182, 196, 245, 260, 364, 455, 490, 637, 910, 980, 1274, 1663, 1820, 2548, 3185, 3326, 6370, 6652, 8315, 11641, 12740, 16630, 21619, 23282, 33260, 43238, 46564, 58205, 81487, 86476, 108095, 116410, 151333, 162974, 216190, 232820, 302666, 325948, 407435, 432380, 605332, 756665, 814870, 1059331, 1513330, 1629740, 2118662, 3026660, 4237324, 5296655, 10593310, 21186620]

約数ペア:

[(1, 21186620), (2, 10593310), (4, 5296655), (5, 4237324), (7, 3026660), (10, 2118662), (13, 1629740), (14, 1513330), (20, 1059331), (26, 814870), (28, 756665), (35, 605332), (49, 432380), (52, 407435), (65, 325948), (70, 302666), (91, 232820), (98, 216190), (130, 162974), (140, 151333), (182, 116410), (196, 108095), (245, 86476), (260, 81487), (364, 58205), (455, 46564), (490, 43238), (637, 33260), (910, 23282), (980, 21619), (1274, 16630), (1663, 12740), (1820, 11641), (2548, 8315), (3185, 6652), (3326, 6370)]