28298920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{54421}}^1$

素因数の和:54445

約数の個数: 32

約数和(自身を含む): 68571720

約数和(自身を除く): 40272800

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 54421, 108842, 217684, 272105, 435368, 544210, 707473, 1088420, 1414946, 2176840, 2829892, 3537365, 5659784, 7074730, 14149460, 28298920]

約数ペア:

[(1, 28298920), (2, 14149460), (4, 7074730), (5, 5659784), (8, 3537365), (10, 2829892), (13, 2176840), (20, 1414946), (26, 1088420), (40, 707473), (52, 544210), (65, 435368), (104, 272105), (130, 217684), (260, 108842), (520, 54421)]