20438480

素因数分解:

$2^4\times 5^1\times {\mathrm{449}}^1\times {\mathrm{569}}^1$

素因数の和:1031

約数の個数: 40

約数和(自身を含む): 47709000

約数和(自身を除く): 27270520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 449, 569, 898, 1138, 1796, 2245, 2276, 2845, 3592, 4490, 4552, 5690, 7184, 8980, 9104, 11380, 17960, 22760, 35920, 45520, 255481, 510962, 1021924, 1277405, 2043848, 2554810, 4087696, 5109620, 10219240, 20438480]

約数ペア:

[(1, 20438480), (2, 10219240), (4, 5109620), (5, 4087696), (8, 2554810), (10, 2043848), (16, 1277405), (20, 1021924), (40, 510962), (80, 255481), (449, 45520), (569, 35920), (898, 22760), (1138, 17960), (1796, 11380), (2245, 9104), (2276, 8980), (2845, 7184), (3592, 5690), (4490, 4552)]