21000391664

素因数分解:

$2^4\times 7^1\times {\mathrm{397}}^1\times {\mathrm{472301}}^1$

素因数の和:472713

約数の個数: 40

約数和(自身を含む): 46618096608

約数和(自身を除く): 25617704944

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 397, 794, 1588, 2779, 3176, 5558, 6352, 11116, 22232, 44464, 472301, 944602, 1889204, 3306107, 3778408, 6612214, 7556816, 13224428, 26448856, 52897712, 187503497, 375006994, 750013988, 1312524479, 1500027976, 2625048958, 3000055952, 5250097916, 10500195832, 21000391664]

約数ペア:

[(1, 21000391664), (2, 10500195832), (4, 5250097916), (7, 3000055952), (8, 2625048958), (14, 1500027976), (16, 1312524479), (28, 750013988), (56, 375006994), (112, 187503497), (397, 52897712), (794, 26448856), (1588, 13224428), (2779, 7556816), (3176, 6612214), (5558, 3778408), (6352, 3306107), (11116, 1889204), (22232, 944602), (44464, 472301)]