2147990

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{41}}^1$

素因数の和:105

約数の個数: 48

約数和(自身を含む): 4427136

約数和(自身を除く): 2279146

約数列:

[1, 2, 5, 10, 13, 26, 31, 41, 62, 65, 82, 130, 155, 169, 205, 310, 338, 403, 410, 533, 806, 845, 1066, 1271, 1690, 2015, 2542, 2665, 4030, 5239, 5330, 6355, 6929, 10478, 12710, 13858, 16523, 26195, 33046, 34645, 52390, 69290, 82615, 165230, 214799, 429598, 1073995, 2147990]

約数ペア:

[(1, 2147990), (2, 1073995), (5, 429598), (10, 214799), (13, 165230), (26, 82615), (31, 69290), (41, 52390), (62, 34645), (65, 33046), (82, 26195), (130, 16523), (155, 13858), (169, 12710), (205, 10478), (310, 6929), (338, 6355), (403, 5330), (410, 5239), (533, 4030), (806, 2665), (845, 2542), (1066, 2015), (1271, 1690)]