20406906

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{2357}}^1$

素因数の和:2415

約数の個数: 48

約数和(自身を含む): 48923784

約数和(自身を除く): 28516878

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 37, 39, 74, 78, 111, 117, 222, 234, 333, 481, 666, 962, 1443, 2357, 2886, 4329, 4714, 7071, 8658, 14142, 21213, 30641, 42426, 61282, 87209, 91923, 174418, 183846, 261627, 275769, 523254, 551538, 784881, 1133717, 1569762, 2267434, 3401151, 6802302, 10203453, 20406906]

約数ペア:

[(1, 20406906), (2, 10203453), (3, 6802302), (6, 3401151), (9, 2267434), (13, 1569762), (18, 1133717), (26, 784881), (37, 551538), (39, 523254), (74, 275769), (78, 261627), (111, 183846), (117, 174418), (222, 91923), (234, 87209), (333, 61282), (481, 42426), (666, 30641), (962, 21213), (1443, 14142), (2357, 8658), (2886, 7071), (4329, 4714)]