499980400

素因数分解:

$2^4\times 5^2\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{661}}^1$

素因数の和:771

約数の個数: 120

約数和(自身を含む): 1262185088

約数和(自身を除く): 762204688

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 40, 50, 61, 62, 80, 100, 122, 124, 155, 200, 244, 248, 305, 310, 400, 488, 496, 610, 620, 661, 775, 976, 1220, 1240, 1322, 1525, 1550, 1891, 2440, 2480, 2644, 3050, 3100, 3305, 3782, 4880, 5288, 6100, 6200, 6610, 7564, 9455, 10576, 12200, 12400, 13220, 15128, 16525, 18910, 20491, 24400, 26440, 30256, 33050, 37820, 40321, 40982, 47275, 52880, 66100, 75640, 80642, 81964, 94550, 102455, 132200, 151280, 161284, 163928, 189100, 201605, 204910, 264400, 322568, 327856, 378200, 403210, 409820, 512275, 645136, 756400, 806420, 819640, 1008025, 1024550, 1249951, 1612840, 1639280, 2016050, 2049100, 2499902, 3225680, 4032100, 4098200, 4999804, 6249755, 8064200, 8196400, 9999608, 12499510, 16128400, 19999216, 24999020, 31248775, 49998040, 62497550, 99996080, 124995100, 249990200, 499980400]

約数ペア:

[(1, 499980400), (2, 249990200), (4, 124995100), (5, 99996080), (8, 62497550), (10, 49998040), (16, 31248775), (20, 24999020), (25, 19999216), (31, 16128400), (40, 12499510), (50, 9999608), (61, 8196400), (62, 8064200), (80, 6249755), (100, 4999804), (122, 4098200), (124, 4032100), (155, 3225680), (200, 2499902), (244, 2049100), (248, 2016050), (305, 1639280), (310, 1612840), (400, 1249951), (488, 1024550), (496, 1008025), (610, 819640), (620, 806420), (661, 756400), (775, 645136), (976, 512275), (1220, 409820), (1240, 403210), (1322, 378200), (1525, 327856), (1550, 322568), (1891, 264400), (2440, 204910), (2480, 201605), (2644, 189100), (3050, 163928), (3100, 161284), (3305, 151280), (3782, 132200), (4880, 102455), (5288, 94550), (6100, 81964), (6200, 80642), (6610, 75640), (7564, 66100), (9455, 52880), (10576, 47275), (12200, 40982), (12400, 40321), (13220, 37820), (15128, 33050), (16525, 30256), (18910, 26440), (20491, 24400)]