18720764

素因数分解:

$2^2\times {\mathrm{41}}^1\times {\mathrm{211}}^1\times {\mathrm{541}}^1$

素因数の和:797

約数の個数: 24

約数和(自身を含む): 33781776

約数和(自身を除く): 15061012

約数列:

[1, 2, 4, 41, 82, 164, 211, 422, 541, 844, 1082, 2164, 8651, 17302, 22181, 34604, 44362, 88724, 114151, 228302, 456604, 4680191, 9360382, 18720764]

約数ペア:

[(1, 18720764), (2, 9360382), (4, 4680191), (41, 456604), (82, 228302), (164, 114151), (211, 88724), (422, 44362), (541, 34604), (844, 22181), (1082, 17302), (2164, 8651)]