20197840

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19421}}^1$

素因数の和:19447

約数の個数: 40

約数和(自身を含む): 50574888

約数和(自身を除く): 30377048

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 19421, 38842, 77684, 97105, 155368, 194210, 252473, 310736, 388420, 504946, 776840, 1009892, 1262365, 1553680, 2019784, 2524730, 4039568, 5049460, 10098920, 20197840]

約数ペア:

[(1, 20197840), (2, 10098920), (4, 5049460), (5, 4039568), (8, 2524730), (10, 2019784), (13, 1553680), (16, 1262365), (20, 1009892), (26, 776840), (40, 504946), (52, 388420), (65, 310736), (80, 252473), (104, 194210), (130, 155368), (208, 97105), (260, 77684), (520, 38842), (1040, 19421)]