20438605

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{107}}^1\times {\mathrm{151}}^1$

素因数の和:297

約数の個数: 32

約数和(自身を含む): 28366848

約数和(自身を除く): 7928243

約数列:

[1, 5, 11, 23, 55, 107, 115, 151, 253, 535, 755, 1177, 1265, 1661, 2461, 3473, 5885, 8305, 12305, 16157, 17365, 27071, 38203, 80785, 135355, 177727, 191015, 371611, 888635, 1858055, 4087721, 20438605]

約数ペア:

[(1, 20438605), (5, 4087721), (11, 1858055), (23, 888635), (55, 371611), (107, 191015), (115, 177727), (151, 135355), (253, 80785), (535, 38203), (755, 27071), (1177, 17365), (1265, 16157), (1661, 12305), (2461, 8305), (3473, 5885)]