18307940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{251}}^1\times {\mathrm{521}}^1$

素因数の和:788

約数の個数: 48

約数和(自身を含む): 44198784

約数和(自身を除く): 25890844

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 251, 502, 521, 1004, 1042, 1255, 1757, 2084, 2510, 2605, 3514, 3647, 5020, 5210, 7028, 7294, 8785, 10420, 14588, 17570, 18235, 35140, 36470, 72940, 130771, 261542, 523084, 653855, 915397, 1307710, 1830794, 2615420, 3661588, 4576985, 9153970, 18307940]

約数ペア:

[(1, 18307940), (2, 9153970), (4, 4576985), (5, 3661588), (7, 2615420), (10, 1830794), (14, 1307710), (20, 915397), (28, 653855), (35, 523084), (70, 261542), (140, 130771), (251, 72940), (502, 36470), (521, 35140), (1004, 18235), (1042, 17570), (1255, 14588), (1757, 10420), (2084, 8785), (2510, 7294), (2605, 7028), (3514, 5210), (3647, 5020)]