18990135

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{13613}}^1$

素因数の和:13655

約数の個数: 24

約数和(自身を含む): 33980544

約数和(自身を除く): 14990409

約数列:

[1, 3, 5, 9, 15, 31, 45, 93, 155, 279, 465, 1395, 13613, 40839, 68065, 122517, 204195, 422003, 612585, 1266009, 2110015, 3798027, 6330045, 18990135]

約数ペア:

[(1, 18990135), (3, 6330045), (5, 3798027), (9, 2110015), (15, 1266009), (31, 612585), (45, 422003), (93, 204195), (155, 122517), (279, 68065), (465, 40839), (1395, 13613)]