21127540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{229}}^1\times {\mathrm{659}}^1$

素因数の和:904

約数の個数: 48

約数和(自身を含む): 51004800

約数和(自身を除く): 29877260

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 229, 458, 659, 916, 1145, 1318, 1603, 2290, 2636, 3206, 3295, 4580, 4613, 6412, 6590, 8015, 9226, 13180, 16030, 18452, 23065, 32060, 46130, 92260, 150911, 301822, 603644, 754555, 1056377, 1509110, 2112754, 3018220, 4225508, 5281885, 10563770, 21127540]

約数ペア:

[(1, 21127540), (2, 10563770), (4, 5281885), (5, 4225508), (7, 3018220), (10, 2112754), (14, 1509110), (20, 1056377), (28, 754555), (35, 603644), (70, 301822), (140, 150911), (229, 92260), (458, 46130), (659, 32060), (916, 23065), (1145, 18452), (1318, 16030), (1603, 13180), (2290, 9226), (2636, 8015), (3206, 6590), (3295, 6412), (4580, 4613)]