21407205

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{2423}}^1$

素因数の和:2481

約数の個数: 32

約数和(自身を含む): 37232640

約数和(自身を除く): 15825435

約数列:

[1, 3, 5, 15, 19, 31, 57, 93, 95, 155, 285, 465, 589, 1767, 2423, 2945, 7269, 8835, 12115, 36345, 46037, 75113, 138111, 225339, 230185, 375565, 690555, 1126695, 1427147, 4281441, 7135735, 21407205]

約数ペア:

[(1, 21407205), (3, 7135735), (5, 4281441), (15, 1427147), (19, 1126695), (31, 690555), (57, 375565), (93, 230185), (95, 225339), (155, 138111), (285, 75113), (465, 46037), (589, 36345), (1767, 12115), (2423, 8835), (2945, 7269)]