20680816

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{5233}}^1$

素因数の和:5273

約数の個数: 40

約数和(自身を含む): 45431120

約数和(自身を除く): 24750304

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 38, 52, 76, 104, 152, 208, 247, 304, 494, 988, 1976, 3952, 5233, 10466, 20932, 41864, 68029, 83728, 99427, 136058, 198854, 272116, 397708, 544232, 795416, 1088464, 1292551, 1590832, 2585102, 5170204, 10340408, 20680816]

約数ペア:

[(1, 20680816), (2, 10340408), (4, 5170204), (8, 2585102), (13, 1590832), (16, 1292551), (19, 1088464), (26, 795416), (38, 544232), (52, 397708), (76, 272116), (104, 198854), (152, 136058), (208, 99427), (247, 83728), (304, 68029), (494, 41864), (988, 20932), (1976, 10466), (3952, 5233)]