21691665

素因数分解:

$3^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{3919}}^1$

素因数の和:3974

約数の個数: 32

約数和(自身を含む): 39513600

約数和(自身を除く): 17821935

約数列:

[1, 3, 5, 9, 15, 27, 41, 45, 123, 135, 205, 369, 615, 1107, 1845, 3919, 5535, 11757, 19595, 35271, 58785, 105813, 160679, 176355, 482037, 529065, 803395, 1446111, 2410185, 4338333, 7230555, 21691665]

約数ペア:

[(1, 21691665), (3, 7230555), (5, 4338333), (9, 2410185), (15, 1446111), (27, 803395), (41, 529065), (45, 482037), (123, 176355), (135, 160679), (205, 105813), (369, 58785), (615, 35271), (1107, 19595), (1845, 11757), (3919, 5535)]