28478840

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{54767}}^1$

素因数の和:54791

約数の個数: 32

約数和(自身を含む): 69007680

約数和(自身を除く): 40528840

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 54767, 109534, 219068, 273835, 438136, 547670, 711971, 1095340, 1423942, 2190680, 2847884, 3559855, 5695768, 7119710, 14239420, 28478840]

約数ペア:

[(1, 28478840), (2, 14239420), (4, 7119710), (5, 5695768), (8, 3559855), (10, 2847884), (13, 2190680), (20, 1423942), (26, 1095340), (40, 711971), (52, 547670), (65, 438136), (104, 273835), (130, 219068), (260, 109534), (520, 54767)]