81788020

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{293}}^1\times {\mathrm{821}}^1$

素因数の和:1140

約数の個数: 48

約数和(自身を含む): 182701008

約数和(自身を除く): 100912988

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 293, 340, 586, 821, 1172, 1465, 1642, 2930, 3284, 4105, 4981, 5860, 8210, 9962, 13957, 16420, 19924, 24905, 27914, 49810, 55828, 69785, 99620, 139570, 240553, 279140, 481106, 962212, 1202765, 2405530, 4089401, 4811060, 8178802, 16357604, 20447005, 40894010, 81788020]

約数ペア:

[(1, 81788020), (2, 40894010), (4, 20447005), (5, 16357604), (10, 8178802), (17, 4811060), (20, 4089401), (34, 2405530), (68, 1202765), (85, 962212), (170, 481106), (293, 279140), (340, 240553), (586, 139570), (821, 99620), (1172, 69785), (1465, 55828), (1642, 49810), (2930, 27914), (3284, 24905), (4105, 19924), (4981, 16420), (5860, 13957), (8210, 9962)]