21718197

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{241}}^1$

素因数の和:314

約数の個数: 48

約数和(自身を含む): 36241920

約数和(自身を除く): 14523723

約数列:

[1, 3, 9, 17, 19, 31, 51, 57, 93, 153, 171, 241, 279, 323, 527, 589, 723, 969, 1581, 1767, 2169, 2907, 4097, 4579, 4743, 5301, 7471, 10013, 12291, 13737, 22413, 30039, 36873, 41211, 67239, 77843, 90117, 127007, 141949, 233529, 381021, 425847, 700587, 1143063, 1277541, 2413133, 7239399, 21718197]

約数ペア:

[(1, 21718197), (3, 7239399), (9, 2413133), (17, 1277541), (19, 1143063), (31, 700587), (51, 425847), (57, 381021), (93, 233529), (153, 141949), (171, 127007), (241, 90117), (279, 77843), (323, 67239), (527, 41211), (589, 36873), (723, 30039), (969, 22413), (1581, 13737), (1767, 12291), (2169, 10013), (2907, 7471), (4097, 5301), (4579, 4743)]