20993460

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{103}}^1$

素因数の和:237

約数の個数: 96

約数和(自身を含む): 61501440

約数和(自身を除く): 40507980

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 43, 60, 79, 86, 103, 129, 158, 172, 206, 215, 237, 258, 309, 316, 395, 412, 430, 474, 515, 516, 618, 645, 790, 860, 948, 1030, 1185, 1236, 1290, 1545, 1580, 2060, 2370, 2580, 3090, 3397, 4429, 4740, 6180, 6794, 8137, 8858, 10191, 13287, 13588, 16274, 16985, 17716, 20382, 22145, 24411, 26574, 32548, 33970, 40685, 40764, 44290, 48822, 50955, 53148, 66435, 67940, 81370, 88580, 97644, 101910, 122055, 132870, 162740, 203820, 244110, 265740, 349891, 488220, 699782, 1049673, 1399564, 1749455, 2099346, 3498910, 4198692, 5248365, 6997820, 10496730, 20993460]

約数ペア:

[(1, 20993460), (2, 10496730), (3, 6997820), (4, 5248365), (5, 4198692), (6, 3498910), (10, 2099346), (12, 1749455), (15, 1399564), (20, 1049673), (30, 699782), (43, 488220), (60, 349891), (79, 265740), (86, 244110), (103, 203820), (129, 162740), (158, 132870), (172, 122055), (206, 101910), (215, 97644), (237, 88580), (258, 81370), (309, 67940), (316, 66435), (395, 53148), (412, 50955), (430, 48822), (474, 44290), (515, 40764), (516, 40685), (618, 33970), (645, 32548), (790, 26574), (860, 24411), (948, 22145), (1030, 20382), (1185, 17716), (1236, 16985), (1290, 16274), (1545, 13588), (1580, 13287), (2060, 10191), (2370, 8858), (2580, 8137), (3090, 6794), (3397, 6180), (4429, 4740)]