139386920

素因数分解:

$2^3\times 5^1\times {\mathrm{1021}}^1\times {\mathrm{3413}}^1$

素因数の和:4445

約数の個数: 32

約数和(自身を含む): 314019720

約数和(自身を除く): 174632800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1021, 2042, 3413, 4084, 5105, 6826, 8168, 10210, 13652, 17065, 20420, 27304, 34130, 40840, 68260, 136520, 3484673, 6969346, 13938692, 17423365, 27877384, 34846730, 69693460, 139386920]

約数ペア:

[(1, 139386920), (2, 69693460), (4, 34846730), (5, 27877384), (8, 17423365), (10, 13938692), (20, 6969346), (40, 3484673), (1021, 136520), (2042, 68260), (3413, 40840), (4084, 34130), (5105, 27304), (6826, 20420), (8168, 17065), (10210, 13652)]