81071980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{409}}^1$

素因数の和:499

約数の個数: 96

約数和(自身を含む): 200854080

約数和(自身を除く): 119782100

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 34, 44, 53, 55, 68, 85, 106, 110, 170, 187, 212, 220, 265, 340, 374, 409, 530, 583, 748, 818, 901, 935, 1060, 1166, 1636, 1802, 1870, 2045, 2332, 2915, 3604, 3740, 4090, 4499, 4505, 5830, 6953, 8180, 8998, 9010, 9911, 11660, 13906, 17996, 18020, 19822, 21677, 22495, 27812, 34765, 39644, 43354, 44990, 49555, 69530, 76483, 86708, 89980, 99110, 108385, 139060, 152966, 198220, 216770, 238447, 305932, 368509, 382415, 433540, 476894, 737018, 764830, 953788, 1192235, 1474036, 1529660, 1842545, 2384470, 3685090, 4053599, 4768940, 7370180, 8107198, 16214396, 20267995, 40535990, 81071980]

約数ペア:

[(1, 81071980), (2, 40535990), (4, 20267995), (5, 16214396), (10, 8107198), (11, 7370180), (17, 4768940), (20, 4053599), (22, 3685090), (34, 2384470), (44, 1842545), (53, 1529660), (55, 1474036), (68, 1192235), (85, 953788), (106, 764830), (110, 737018), (170, 476894), (187, 433540), (212, 382415), (220, 368509), (265, 305932), (340, 238447), (374, 216770), (409, 198220), (530, 152966), (583, 139060), (748, 108385), (818, 99110), (901, 89980), (935, 86708), (1060, 76483), (1166, 69530), (1636, 49555), (1802, 44990), (1870, 43354), (2045, 39644), (2332, 34765), (2915, 27812), (3604, 22495), (3740, 21677), (4090, 19822), (4499, 18020), (4505, 17996), (5830, 13906), (6953, 11660), (8180, 9911), (8998, 9010)]