81499775

素因数分解:

$5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{181}}^1$

素因数の和:312

約数の個数: 48

約数和(自身を含む): 121325568

約数和(自身を除く): 39825793

約数列:

[1, 5, 7, 25, 31, 35, 83, 155, 175, 181, 217, 415, 581, 775, 905, 1085, 1267, 2075, 2573, 2905, 4525, 5425, 5611, 6335, 12865, 14525, 15023, 18011, 28055, 31675, 39277, 64325, 75115, 90055, 105161, 140275, 196385, 375575, 450275, 465713, 525805, 981925, 2328565, 2629025, 3259991, 11642825, 16299955, 81499775]

約数ペア:

[(1, 81499775), (5, 16299955), (7, 11642825), (25, 3259991), (31, 2629025), (35, 2328565), (83, 981925), (155, 525805), (175, 465713), (181, 450275), (217, 375575), (415, 196385), (581, 140275), (775, 105161), (905, 90055), (1085, 75115), (1267, 64325), (2075, 39277), (2573, 31675), (2905, 28055), (4525, 18011), (5425, 15023), (5611, 14525), (6335, 12865)]