21696615

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{83}}^1\times {\mathrm{157}}^1$

素因数の和:288

約数の個数: 48

約数和(自身を含む): 39338208

約数和(自身を除く): 17641593

約数列:

[1, 3, 5, 9, 15, 37, 45, 83, 111, 157, 185, 249, 333, 415, 471, 555, 747, 785, 1245, 1413, 1665, 2355, 3071, 3735, 5809, 7065, 9213, 13031, 15355, 17427, 27639, 29045, 39093, 46065, 52281, 65155, 87135, 117279, 138195, 195465, 261405, 482147, 586395, 1446441, 2410735, 4339323, 7232205, 21696615]

約数ペア:

[(1, 21696615), (3, 7232205), (5, 4339323), (9, 2410735), (15, 1446441), (37, 586395), (45, 482147), (83, 261405), (111, 195465), (157, 138195), (185, 117279), (249, 87135), (333, 65155), (415, 52281), (471, 46065), (555, 39093), (747, 29045), (785, 27639), (1245, 17427), (1413, 15355), (1665, 13031), (2355, 9213), (3071, 7065), (3735, 5809)]