18981808

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{51581}}^1$

素因数の和:51612

約数の個数: 20

約数和(自身を含む): 38377008

約数和(自身を除く): 19395200

約数列:

[1, 2, 4, 8, 16, 23, 46, 92, 184, 368, 51581, 103162, 206324, 412648, 825296, 1186363, 2372726, 4745452, 9490904, 18981808]

約数ペア:

[(1, 18981808), (2, 9490904), (4, 4745452), (8, 2372726), (16, 1186363), (23, 825296), (46, 412648), (92, 206324), (184, 103162), (368, 51581)]