21798660

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27947}}^1$

素因数の和:27972

約数の個数: 48

約数和(自身を含む): 65733696

約数和(自身を除く): 43935036

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 27947, 55894, 83841, 111788, 139735, 167682, 279470, 335364, 363311, 419205, 558940, 726622, 838410, 1089933, 1453244, 1676820, 1816555, 2179866, 3633110, 4359732, 5449665, 7266220, 10899330, 21798660]

約数ペア:

[(1, 21798660), (2, 10899330), (3, 7266220), (4, 5449665), (5, 4359732), (6, 3633110), (10, 2179866), (12, 1816555), (13, 1676820), (15, 1453244), (20, 1089933), (26, 838410), (30, 726622), (39, 558940), (52, 419205), (60, 363311), (65, 335364), (78, 279470), (130, 167682), (156, 139735), (195, 111788), (260, 83841), (390, 55894), (780, 27947)]