18978700

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^2\times {\mathrm{1123}}^1$

素因数の和:1163

約数の個数: 54

約数和(自身を含む): 44635164

約数和(自身を除く): 25656464

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 130, 169, 260, 325, 338, 650, 676, 845, 1123, 1300, 1690, 2246, 3380, 4225, 4492, 5615, 8450, 11230, 14599, 16900, 22460, 28075, 29198, 56150, 58396, 72995, 112300, 145990, 189787, 291980, 364975, 379574, 729950, 759148, 948935, 1459900, 1897870, 3795740, 4744675, 9489350, 18978700]

約数ペア:

[(1, 18978700), (2, 9489350), (4, 4744675), (5, 3795740), (10, 1897870), (13, 1459900), (20, 948935), (25, 759148), (26, 729950), (50, 379574), (52, 364975), (65, 291980), (100, 189787), (130, 145990), (169, 112300), (260, 72995), (325, 58396), (338, 56150), (650, 29198), (676, 28075), (845, 22460), (1123, 16900), (1300, 14599), (1690, 11230), (2246, 8450), (3380, 5615), (4225, 4492)]