21782680

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{4157}}^1$

素因数の和:4299

約数の個数: 32

約数和(自身を含む): 49397040

約数和(自身を除く): 27614360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 524, 655, 1048, 1310, 2620, 4157, 5240, 8314, 16628, 20785, 33256, 41570, 83140, 166280, 544567, 1089134, 2178268, 2722835, 4356536, 5445670, 10891340, 21782680]

約数ペア:

[(1, 21782680), (2, 10891340), (4, 5445670), (5, 4356536), (8, 2722835), (10, 2178268), (20, 1089134), (40, 544567), (131, 166280), (262, 83140), (524, 41570), (655, 33256), (1048, 20785), (1310, 16628), (2620, 8314), (4157, 5240)]