20397260

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{4129}}^1$

素因数の和:4170

約数の個数: 48

約数和(自身を含む): 48568800

約数和(自身を除く): 28171540

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 247, 260, 380, 494, 988, 1235, 2470, 4129, 4940, 8258, 16516, 20645, 41290, 53677, 78451, 82580, 107354, 156902, 214708, 268385, 313804, 392255, 536770, 784510, 1019863, 1073540, 1569020, 2039726, 4079452, 5099315, 10198630, 20397260]

約数ペア:

[(1, 20397260), (2, 10198630), (4, 5099315), (5, 4079452), (10, 2039726), (13, 1569020), (19, 1073540), (20, 1019863), (26, 784510), (38, 536770), (52, 392255), (65, 313804), (76, 268385), (95, 214708), (130, 156902), (190, 107354), (247, 82580), (260, 78451), (380, 53677), (494, 41290), (988, 20645), (1235, 16516), (2470, 8258), (4129, 4940)]