138440420

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{223291}}^1$

素因数の和:223331

約数の個数: 24

約数和(自身を含む): 300104448

約数和(自身を除く): 161664028

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 223291, 446582, 893164, 1116455, 2232910, 4465820, 6922021, 13844042, 27688084, 34610105, 69220210, 138440420]

約数ペア:

[(1, 138440420), (2, 69220210), (4, 34610105), (5, 27688084), (10, 13844042), (20, 6922021), (31, 4465820), (62, 2232910), (124, 1116455), (155, 893164), (310, 446582), (620, 223291)]