19909912

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{3709}}^1$

素因数の和:3787

約数の個数: 32

約数和(自身を含む): 41403600

約数和(自身を除く): 21493688

約数列:

[1, 2, 4, 8, 11, 22, 44, 61, 88, 122, 244, 488, 671, 1342, 2684, 3709, 5368, 7418, 14836, 29672, 40799, 81598, 163196, 226249, 326392, 452498, 904996, 1809992, 2488739, 4977478, 9954956, 19909912]

約数ペア:

[(1, 19909912), (2, 9954956), (4, 4977478), (8, 2488739), (11, 1809992), (22, 904996), (44, 452498), (61, 326392), (88, 226249), (122, 163196), (244, 81598), (488, 40799), (671, 29672), (1342, 14836), (2684, 7418), (3709, 5368)]