640405908

素因数分解:

$2^2\times 3^2\times {\mathrm{89}}^1\times {\mathrm{199877}}^1$

素因数の和:199976

約数の個数: 36

約数和(自身を含む): 1637000820

約数和(自身を除く): 996594912

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 89, 178, 267, 356, 534, 801, 1068, 1602, 3204, 199877, 399754, 599631, 799508, 1199262, 1798893, 2398524, 3597786, 7195572, 17789053, 35578106, 53367159, 71156212, 106734318, 160101477, 213468636, 320202954, 640405908]

約数ペア:

[(1, 640405908), (2, 320202954), (3, 213468636), (4, 160101477), (6, 106734318), (9, 71156212), (12, 53367159), (18, 35578106), (36, 17789053), (89, 7195572), (178, 3597786), (267, 2398524), (356, 1798893), (534, 1199262), (801, 799508), (1068, 599631), (1602, 399754), (3204, 199877)]