20109980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{283}}^1$

素因数の和:339

約数の個数: 96

約数和(自身を含む): 51528960

約数和(自身を除く): 31418980

約数列:

[1, 2, 4, 5, 10, 11, 17, 19, 20, 22, 34, 38, 44, 55, 68, 76, 85, 95, 110, 170, 187, 190, 209, 220, 283, 323, 340, 374, 380, 418, 566, 646, 748, 836, 935, 1045, 1132, 1292, 1415, 1615, 1870, 2090, 2830, 3113, 3230, 3553, 3740, 4180, 4811, 5377, 5660, 6226, 6460, 7106, 9622, 10754, 12452, 14212, 15565, 17765, 19244, 21508, 24055, 26885, 31130, 35530, 48110, 52921, 53770, 59147, 62260, 71060, 91409, 96220, 105842, 107540, 118294, 182818, 211684, 236588, 264605, 295735, 365636, 457045, 529210, 591470, 914090, 1005499, 1058420, 1182940, 1828180, 2010998, 4021996, 5027495, 10054990, 20109980]

約数ペア:

[(1, 20109980), (2, 10054990), (4, 5027495), (5, 4021996), (10, 2010998), (11, 1828180), (17, 1182940), (19, 1058420), (20, 1005499), (22, 914090), (34, 591470), (38, 529210), (44, 457045), (55, 365636), (68, 295735), (76, 264605), (85, 236588), (95, 211684), (110, 182818), (170, 118294), (187, 107540), (190, 105842), (209, 96220), (220, 91409), (283, 71060), (323, 62260), (340, 59147), (374, 53770), (380, 52921), (418, 48110), (566, 35530), (646, 31130), (748, 26885), (836, 24055), (935, 21508), (1045, 19244), (1132, 17765), (1292, 15565), (1415, 14212), (1615, 12452), (1870, 10754), (2090, 9622), (2830, 7106), (3113, 6460), (3230, 6226), (3553, 5660), (3740, 5377), (4180, 4811)]