20805615

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{107}}^1\times {\mathrm{149}}^1$

素因数の和:296

約数の個数: 48

約数和(自身を含む): 37908000

約数和(自身を除く): 17102385

約数列:

[1, 3, 5, 9, 15, 29, 45, 87, 107, 145, 149, 261, 321, 435, 447, 535, 745, 963, 1305, 1341, 1605, 2235, 3103, 4321, 4815, 6705, 9309, 12963, 15515, 15943, 21605, 27927, 38889, 46545, 47829, 64815, 79715, 139635, 143487, 194445, 239145, 462347, 717435, 1387041, 2311735, 4161123, 6935205, 20805615]

約数ペア:

[(1, 20805615), (3, 6935205), (5, 4161123), (9, 2311735), (15, 1387041), (29, 717435), (45, 462347), (87, 239145), (107, 194445), (145, 143487), (149, 139635), (261, 79715), (321, 64815), (435, 47829), (447, 46545), (535, 38889), (745, 27927), (963, 21605), (1305, 15943), (1341, 15515), (1605, 12963), (2235, 9309), (3103, 6705), (4321, 4815)]