21253365

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{619}}^1$

素因数の和:746

約数の個数: 48

約数和(自身を含む): 42556800

約数和(自身を除く): 21303435

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 109, 315, 327, 545, 619, 763, 981, 1635, 1857, 2289, 3095, 3815, 4333, 4905, 5571, 6867, 9285, 11445, 12999, 21665, 27855, 34335, 38997, 64995, 67471, 194985, 202413, 337355, 472297, 607239, 1012065, 1416891, 2361485, 3036195, 4250673, 7084455, 21253365]

約数ペア:

[(1, 21253365), (3, 7084455), (5, 4250673), (7, 3036195), (9, 2361485), (15, 1416891), (21, 1012065), (35, 607239), (45, 472297), (63, 337355), (105, 202413), (109, 194985), (315, 67471), (327, 64995), (545, 38997), (619, 34335), (763, 27855), (981, 21665), (1635, 12999), (1857, 11445), (2289, 9285), (3095, 6867), (3815, 5571), (4333, 4905)]