138790120

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{495679}}^1$

素因数の和:495697

約数の個数: 32

約数和(自身を含む): 356889600

約数和(自身を除く): 218099480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 495679, 991358, 1982716, 2478395, 3469753, 3965432, 4956790, 6939506, 9913580, 13879012, 17348765, 19827160, 27758024, 34697530, 69395060, 138790120]

約数ペア:

[(1, 138790120), (2, 69395060), (4, 34697530), (5, 27758024), (7, 19827160), (8, 17348765), (10, 13879012), (14, 9913580), (20, 6939506), (28, 4956790), (35, 3965432), (40, 3469753), (56, 2478395), (70, 1982716), (140, 991358), (280, 495679)]