20887900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1117}}^1$

素因数の和:1159

約数の個数: 72

約数和(自身を含む): 52402896

約数和(自身を除く): 31514996

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 25, 34, 44, 50, 55, 68, 85, 100, 110, 170, 187, 220, 275, 340, 374, 425, 550, 748, 850, 935, 1100, 1117, 1700, 1870, 2234, 3740, 4468, 4675, 5585, 9350, 11170, 12287, 18700, 18989, 22340, 24574, 27925, 37978, 49148, 55850, 61435, 75956, 94945, 111700, 122870, 189890, 208879, 245740, 307175, 379780, 417758, 474725, 614350, 835516, 949450, 1044395, 1228700, 1898900, 2088790, 4177580, 5221975, 10443950, 20887900]

約数ペア:

[(1, 20887900), (2, 10443950), (4, 5221975), (5, 4177580), (10, 2088790), (11, 1898900), (17, 1228700), (20, 1044395), (22, 949450), (25, 835516), (34, 614350), (44, 474725), (50, 417758), (55, 379780), (68, 307175), (85, 245740), (100, 208879), (110, 189890), (170, 122870), (187, 111700), (220, 94945), (275, 75956), (340, 61435), (374, 55850), (425, 49148), (550, 37978), (748, 27925), (850, 24574), (935, 22340), (1100, 18989), (1117, 18700), (1700, 12287), (1870, 11170), (2234, 9350), (3740, 5585), (4468, 4675)]