17818180

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{991}}^1$

素因数の和:1060

約数の個数: 48

約数和(自身を含む): 39997440

約数和(自身を除く): 22179260

約数列:

[1, 2, 4, 5, 10, 20, 29, 31, 58, 62, 116, 124, 145, 155, 290, 310, 580, 620, 899, 991, 1798, 1982, 3596, 3964, 4495, 4955, 8990, 9910, 17980, 19820, 28739, 30721, 57478, 61442, 114956, 122884, 143695, 153605, 287390, 307210, 574780, 614420, 890909, 1781818, 3563636, 4454545, 8909090, 17818180]

約数ペア:

[(1, 17818180), (2, 8909090), (4, 4454545), (5, 3563636), (10, 1781818), (20, 890909), (29, 614420), (31, 574780), (58, 307210), (62, 287390), (116, 153605), (124, 143695), (145, 122884), (155, 114956), (290, 61442), (310, 57478), (580, 30721), (620, 28739), (899, 19820), (991, 17980), (1798, 9910), (1982, 8990), (3596, 4955), (3964, 4495)]