81286465

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{83}}^1$

素因数の和:194

約数の個数: 48

約数和(自身を含む): 114367680

約数和(自身を除く): 33081215

約数列:

[1, 5, 13, 19, 61, 65, 83, 95, 169, 247, 305, 415, 793, 845, 1079, 1159, 1235, 1577, 3211, 3965, 5063, 5395, 5795, 7885, 10309, 14027, 15067, 16055, 20501, 25315, 51545, 65819, 70135, 75335, 96197, 102505, 195871, 266513, 329095, 480985, 855647, 979355, 1250561, 1332565, 4278235, 6252805, 16257293, 81286465]

約数ペア:

[(1, 81286465), (5, 16257293), (13, 6252805), (19, 4278235), (61, 1332565), (65, 1250561), (83, 979355), (95, 855647), (169, 480985), (247, 329095), (305, 266513), (415, 195871), (793, 102505), (845, 96197), (1079, 75335), (1159, 70135), (1235, 65819), (1577, 51545), (3211, 25315), (3965, 20501), (5063, 16055), (5395, 15067), (5795, 14027), (7885, 10309)]