201605000

素因数分解:

$2^3\times 5^4\times {\mathrm{61}}^1\times {\mathrm{661}}^1$

素因数の和:748

約数の個数: 80

約数和(自身を含む): 480830460

約数和(自身を除く): 279225460

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 61, 100, 122, 125, 200, 244, 250, 305, 488, 500, 610, 625, 661, 1000, 1220, 1250, 1322, 1525, 2440, 2500, 2644, 3050, 3305, 5000, 5288, 6100, 6610, 7625, 12200, 13220, 15250, 16525, 26440, 30500, 33050, 38125, 40321, 61000, 66100, 76250, 80642, 82625, 132200, 152500, 161284, 165250, 201605, 305000, 322568, 330500, 403210, 413125, 661000, 806420, 826250, 1008025, 1612840, 1652500, 2016050, 3305000, 4032100, 5040125, 8064200, 10080250, 20160500, 25200625, 40321000, 50401250, 100802500, 201605000]

約数ペア:

[(1, 201605000), (2, 100802500), (4, 50401250), (5, 40321000), (8, 25200625), (10, 20160500), (20, 10080250), (25, 8064200), (40, 5040125), (50, 4032100), (61, 3305000), (100, 2016050), (122, 1652500), (125, 1612840), (200, 1008025), (244, 826250), (250, 806420), (305, 661000), (488, 413125), (500, 403210), (610, 330500), (625, 322568), (661, 305000), (1000, 201605), (1220, 165250), (1250, 161284), (1322, 152500), (1525, 132200), (2440, 82625), (2500, 80642), (2644, 76250), (3050, 66100), (3305, 61000), (5000, 40321), (5288, 38125), (6100, 33050), (6610, 30500), (7625, 26440), (12200, 16525), (13220, 15250)]