81836440

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{331}}^1\times {\mathrm{883}}^1$

素因数の和:1232

約数の個数: 64

約数和(自身を含む): 211311360

約数和(自身を除く): 129474920

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 331, 662, 883, 1324, 1655, 1766, 2317, 2648, 3310, 3532, 4415, 4634, 6181, 6620, 7064, 8830, 9268, 11585, 12362, 13240, 17660, 18536, 23170, 24724, 30905, 35320, 46340, 49448, 61810, 92680, 123620, 247240, 292273, 584546, 1169092, 1461365, 2045911, 2338184, 2922730, 4091822, 5845460, 8183644, 10229555, 11690920, 16367288, 20459110, 40918220, 81836440]

約数ペア:

[(1, 81836440), (2, 40918220), (4, 20459110), (5, 16367288), (7, 11690920), (8, 10229555), (10, 8183644), (14, 5845460), (20, 4091822), (28, 2922730), (35, 2338184), (40, 2045911), (56, 1461365), (70, 1169092), (140, 584546), (280, 292273), (331, 247240), (662, 123620), (883, 92680), (1324, 61810), (1655, 49448), (1766, 46340), (2317, 35320), (2648, 30905), (3310, 24724), (3532, 23170), (4415, 18536), (4634, 17660), (6181, 13240), (6620, 12362), (7064, 11585), (8830, 9268)]