21787265

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{131}}^1$

素因数の和:233

約数の個数: 32

約数和(自身を含む): 28892160

約数和(自身を除く): 7104895

約数列:

[1, 5, 29, 31, 37, 131, 145, 155, 185, 655, 899, 1073, 1147, 3799, 4061, 4495, 4847, 5365, 5735, 18995, 20305, 24235, 33263, 117769, 140563, 150257, 166315, 588845, 702815, 751285, 4357453, 21787265]

約数ペア:

[(1, 21787265), (5, 4357453), (29, 751285), (31, 702815), (37, 588845), (131, 166315), (145, 150257), (155, 140563), (185, 117769), (655, 33263), (899, 24235), (1073, 20305), (1147, 18995), (3799, 5735), (4061, 5365), (4495, 4847)]