81811215

素因数分解:

$3^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{2557}}^1$

素因数の和:2653

約数の個数: 40

約数和(自身を含む): 148568640

約数和(自身を除く): 66757425

約数列:

[1, 3, 5, 9, 15, 27, 45, 79, 81, 135, 237, 395, 405, 711, 1185, 2133, 2557, 3555, 6399, 7671, 10665, 12785, 23013, 31995, 38355, 69039, 115065, 202003, 207117, 345195, 606009, 1010015, 1035585, 1818027, 3030045, 5454081, 9090135, 16362243, 27270405, 81811215]

約数ペア:

[(1, 81811215), (3, 27270405), (5, 16362243), (9, 9090135), (15, 5454081), (27, 3030045), (45, 1818027), (79, 1035585), (81, 1010015), (135, 606009), (237, 345195), (395, 207117), (405, 202003), (711, 115065), (1185, 69039), (2133, 38355), (2557, 31995), (3555, 23013), (6399, 12785), (7671, 10665)]