20639655

素因数分解:

$3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{73}}^1\times {\mathrm{103}}^1$

素因数の和:248

約数の個数: 48

約数和(自身を含む): 37217856

約数和(自身を除く): 16578201

約数列:

[1, 3, 5, 9, 15, 45, 61, 73, 103, 183, 219, 305, 309, 365, 515, 549, 657, 915, 927, 1095, 1545, 2745, 3285, 4453, 4635, 6283, 7519, 13359, 18849, 22265, 22557, 31415, 37595, 40077, 56547, 66795, 67671, 94245, 112785, 200385, 282735, 338355, 458659, 1375977, 2293295, 4127931, 6879885, 20639655]

約数ペア:

[(1, 20639655), (3, 6879885), (5, 4127931), (9, 2293295), (15, 1375977), (45, 458659), (61, 338355), (73, 282735), (103, 200385), (183, 112785), (219, 94245), (305, 67671), (309, 66795), (365, 56547), (515, 40077), (549, 37595), (657, 31415), (915, 22557), (927, 22265), (1095, 18849), (1545, 13359), (2745, 7519), (3285, 6283), (4453, 4635)]