20691818

素因数分解:

$2^1\times 7^4\times {\mathrm{31}}^1\times {\mathrm{139}}^1$

素因数の和:200

約数の個数: 40

約数和(自身を含む): 37645440

約数和(自身を除く): 16953622

約数列:

[1, 2, 7, 14, 31, 49, 62, 98, 139, 217, 278, 343, 434, 686, 973, 1519, 1946, 2401, 3038, 4309, 4802, 6811, 8618, 10633, 13622, 21266, 30163, 47677, 60326, 74431, 95354, 148862, 211141, 333739, 422282, 667478, 1477987, 2955974, 10345909, 20691818]

約数ペア:

[(1, 20691818), (2, 10345909), (7, 2955974), (14, 1477987), (31, 667478), (49, 422282), (62, 333739), (98, 211141), (139, 148862), (217, 95354), (278, 74431), (343, 60326), (434, 47677), (686, 30163), (973, 21266), (1519, 13622), (1946, 10633), (2401, 8618), (3038, 6811), (4309, 4802)]