21059895

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{103}}^1\times {\mathrm{317}}^1$

素因数の和:471

約数の個数: 32

約数和(自身を含む): 34924032

約数和(自身を除く): 13864137

約数列:

[1, 3, 5, 15, 43, 103, 129, 215, 309, 317, 515, 645, 951, 1545, 1585, 4429, 4755, 13287, 13631, 22145, 32651, 40893, 66435, 68155, 97953, 163255, 204465, 489765, 1403993, 4211979, 7019965, 21059895]

約数ペア:

[(1, 21059895), (3, 7019965), (5, 4211979), (15, 1403993), (43, 489765), (103, 204465), (129, 163255), (215, 97953), (309, 68155), (317, 66435), (515, 40893), (645, 32651), (951, 22145), (1545, 13631), (1585, 13287), (4429, 4755)]