638637525

素因数分解:

$3^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{107}}^1\times {\mathrm{647}}^1$

素因数の和:811

約数の個数: 72

約数和(自身を含む): 1184549184

約数和(自身を除く): 545911659

約数列:

[1, 3, 5, 9, 15, 25, 41, 45, 75, 107, 123, 205, 225, 321, 369, 535, 615, 647, 963, 1025, 1605, 1845, 1941, 2675, 3075, 3235, 4387, 4815, 5823, 8025, 9225, 9705, 13161, 16175, 21935, 24075, 26527, 29115, 39483, 48525, 65805, 69229, 79581, 109675, 132635, 145575, 197415, 207687, 238743, 329025, 346145, 397905, 623061, 663175, 987075, 1038435, 1193715, 1730725, 1989525, 2838389, 3115305, 5192175, 5968575, 8515167, 14191945, 15576525, 25545501, 42575835, 70959725, 127727505, 212879175, 638637525]

約数ペア:

[(1, 638637525), (3, 212879175), (5, 127727505), (9, 70959725), (15, 42575835), (25, 25545501), (41, 15576525), (45, 14191945), (75, 8515167), (107, 5968575), (123, 5192175), (205, 3115305), (225, 2838389), (321, 1989525), (369, 1730725), (535, 1193715), (615, 1038435), (647, 987075), (963, 663175), (1025, 623061), (1605, 397905), (1845, 346145), (1941, 329025), (2675, 238743), (3075, 207687), (3235, 197415), (4387, 145575), (4815, 132635), (5823, 109675), (8025, 79581), (9225, 69229), (9705, 65805), (13161, 48525), (16175, 39483), (21935, 29115), (24075, 26527)]