21917925

素因数分解:

$3^3\times 5^2\times {\mathrm{19}}^1\times {\mathrm{1709}}^1$

素因数の和:1747

約数の個数: 48

約数和(自身を含む): 42408000

約数和(自身を除く): 20490075

約数列:

[1, 3, 5, 9, 15, 19, 25, 27, 45, 57, 75, 95, 135, 171, 225, 285, 475, 513, 675, 855, 1425, 1709, 2565, 4275, 5127, 8545, 12825, 15381, 25635, 32471, 42725, 46143, 76905, 97413, 128175, 162355, 230715, 292239, 384525, 487065, 811775, 876717, 1153575, 1461195, 2435325, 4383585, 7305975, 21917925]

約数ペア:

[(1, 21917925), (3, 7305975), (5, 4383585), (9, 2435325), (15, 1461195), (19, 1153575), (25, 876717), (27, 811775), (45, 487065), (57, 384525), (75, 292239), (95, 230715), (135, 162355), (171, 128175), (225, 97413), (285, 76905), (475, 46143), (513, 42725), (675, 32471), (855, 25635), (1425, 15381), (1709, 12825), (2565, 8545), (4275, 5127)]