15663921

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{181}}^1\times {\mathrm{317}}^1$

素因数の和:521

約数の個数: 32

約数和(自身を含む): 25928448

約数和(自身を除く): 10264527

約数列:

[1, 3, 7, 13, 21, 39, 91, 181, 273, 317, 543, 951, 1267, 2219, 2353, 3801, 4121, 6657, 7059, 12363, 16471, 28847, 49413, 57377, 86541, 172131, 401639, 745901, 1204917, 2237703, 5221307, 15663921]

約数ペア:

[(1, 15663921), (3, 5221307), (7, 2237703), (13, 1204917), (21, 745901), (39, 401639), (91, 172131), (181, 86541), (273, 57377), (317, 49413), (543, 28847), (951, 16471), (1267, 12363), (2219, 7059), (2353, 6657), (3801, 4121)]