20591080

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{283}}^1$

素因数の和:418

約数の個数: 64

約数和(自身を含む): 49688640

約数和(自身を除く): 29097560

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 107, 136, 170, 214, 283, 340, 428, 535, 566, 680, 856, 1070, 1132, 1415, 1819, 2140, 2264, 2830, 3638, 4280, 4811, 5660, 7276, 9095, 9622, 11320, 14552, 18190, 19244, 24055, 30281, 36380, 38488, 48110, 60562, 72760, 96220, 121124, 151405, 192440, 242248, 302810, 514777, 605620, 1029554, 1211240, 2059108, 2573885, 4118216, 5147770, 10295540, 20591080]

約数ペア:

[(1, 20591080), (2, 10295540), (4, 5147770), (5, 4118216), (8, 2573885), (10, 2059108), (17, 1211240), (20, 1029554), (34, 605620), (40, 514777), (68, 302810), (85, 242248), (107, 192440), (136, 151405), (170, 121124), (214, 96220), (283, 72760), (340, 60562), (428, 48110), (535, 38488), (566, 36380), (680, 30281), (856, 24055), (1070, 19244), (1132, 18190), (1415, 14552), (1819, 11320), (2140, 9622), (2264, 9095), (2830, 7276), (3638, 5660), (4280, 4811)]