21364780

素因数分解:

$2^2\times 5^1\times {\mathrm{659}}^1\times {\mathrm{1621}}^1$

素因数の和:2289

約数の個数: 24

約数和(自身を含む): 44961840

約数和(自身を除く): 23597060

約数列:

[1, 2, 4, 5, 10, 20, 659, 1318, 1621, 2636, 3242, 3295, 6484, 6590, 8105, 13180, 16210, 32420, 1068239, 2136478, 4272956, 5341195, 10682390, 21364780]

約数ペア:

[(1, 21364780), (2, 10682390), (4, 5341195), (5, 4272956), (10, 2136478), (20, 1068239), (659, 32420), (1318, 16210), (1621, 13180), (2636, 8105), (3242, 6590), (3295, 6484)]