20805420

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{2647}}^1$

素因数の和:2790

約数の個数: 48

約数和(自身を含む): 58722048

約数和(自身を除く): 37916628

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 131, 262, 393, 524, 655, 786, 1310, 1572, 1965, 2620, 2647, 3930, 5294, 7860, 7941, 10588, 13235, 15882, 26470, 31764, 39705, 52940, 79410, 158820, 346757, 693514, 1040271, 1387028, 1733785, 2080542, 3467570, 4161084, 5201355, 6935140, 10402710, 20805420]

約数ペア:

[(1, 20805420), (2, 10402710), (3, 6935140), (4, 5201355), (5, 4161084), (6, 3467570), (10, 2080542), (12, 1733785), (15, 1387028), (20, 1040271), (30, 693514), (60, 346757), (131, 158820), (262, 79410), (393, 52940), (524, 39705), (655, 31764), (786, 26470), (1310, 15882), (1572, 13235), (1965, 10588), (2620, 7941), (2647, 7860), (3930, 5294)]