21389290

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{4013}}^1$

素因数の和:4074

約数の個数: 32

約数和(自身を含む): 42484176

約数和(自身を除く): 21094886

約数列:

[1, 2, 5, 10, 13, 26, 41, 65, 82, 130, 205, 410, 533, 1066, 2665, 4013, 5330, 8026, 20065, 40130, 52169, 104338, 164533, 260845, 329066, 521690, 822665, 1645330, 2138929, 4277858, 10694645, 21389290]

約数ペア:

[(1, 21389290), (2, 10694645), (5, 4277858), (10, 2138929), (13, 1645330), (26, 822665), (41, 521690), (65, 329066), (82, 260845), (130, 164533), (205, 104338), (410, 52169), (533, 40130), (1066, 20065), (2665, 8026), (4013, 5330)]