21978195

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{1091}}^1$

素因数の和:1195

約数の個数: 32

約数和(自身を含む): 37739520

約数和(自身を除く): 15761325

約数列:

[1, 3, 5, 15, 17, 51, 79, 85, 237, 255, 395, 1091, 1185, 1343, 3273, 4029, 5455, 6715, 16365, 18547, 20145, 55641, 86189, 92735, 258567, 278205, 430945, 1292835, 1465213, 4395639, 7326065, 21978195]

約数ペア:

[(1, 21978195), (3, 7326065), (5, 4395639), (15, 1465213), (17, 1292835), (51, 430945), (79, 278205), (85, 258567), (237, 92735), (255, 86189), (395, 55641), (1091, 20145), (1185, 18547), (1343, 16365), (3273, 6715), (4029, 5455)]