28409420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{109267}}^1$

素因数の和:109289

約数の個数: 24

約数和(自身を含む): 64249584

約数和(自身を除く): 35840164

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 109267, 218534, 437068, 546335, 1092670, 1420471, 2185340, 2840942, 5681884, 7102355, 14204710, 28409420]

約数ペア:

[(1, 28409420), (2, 14204710), (4, 7102355), (5, 5681884), (10, 2840942), (13, 2185340), (20, 1420471), (26, 1092670), (52, 546335), (65, 437068), (130, 218534), (260, 109267)]