21665355

素因数分解:

$3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1\times {\mathrm{389}}^1$

素因数の和:523

約数の個数: 32

約数和(自身を含む): 35942400

約数和(自身を除く): 14277045

約数列:

[1, 3, 5, 15, 47, 79, 141, 235, 237, 389, 395, 705, 1167, 1185, 1945, 3713, 5835, 11139, 18283, 18565, 30731, 54849, 55695, 91415, 92193, 153655, 274245, 460965, 1444357, 4333071, 7221785, 21665355]

約数ペア:

[(1, 21665355), (3, 7221785), (5, 4333071), (15, 1444357), (47, 460965), (79, 274245), (141, 153655), (235, 92193), (237, 91415), (389, 55695), (395, 54849), (705, 30731), (1167, 18565), (1185, 18283), (1945, 11139), (3713, 5835)]