21288165

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{2693}}^1$

素因数の和:2749

約数の個数: 32

約数和(自身を含む): 37241856

約数和(自身を除く): 15953691

約数列:

[1, 3, 5, 15, 17, 31, 51, 85, 93, 155, 255, 465, 527, 1581, 2635, 2693, 7905, 8079, 13465, 40395, 45781, 83483, 137343, 228905, 250449, 417415, 686715, 1252245, 1419211, 4257633, 7096055, 21288165]

約数ペア:

[(1, 21288165), (3, 7096055), (5, 4257633), (15, 1419211), (17, 1252245), (31, 686715), (51, 417415), (85, 250449), (93, 228905), (155, 137343), (255, 83483), (465, 45781), (527, 40395), (1581, 13465), (2635, 8079), (2693, 7905)]