80642000

素因数分解:

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

素因数の和:745

約数の個数: 80

約数和(自身を含む): 198488784

約数和(自身を除く): 117846784

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 61, 80, 100, 122, 125, 200, 244, 250, 305, 400, 488, 500, 610, 661, 976, 1000, 1220, 1322, 1525, 2000, 2440, 2644, 3050, 3305, 4880, 5288, 6100, 6610, 7625, 10576, 12200, 13220, 15250, 16525, 24400, 26440, 30500, 33050, 40321, 52880, 61000, 66100, 80642, 82625, 122000, 132200, 161284, 165250, 201605, 264400, 322568, 330500, 403210, 645136, 661000, 806420, 1008025, 1322000, 1612840, 2016050, 3225680, 4032100, 5040125, 8064200, 10080250, 16128400, 20160500, 40321000, 80642000]

約数ペア:

[(1, 80642000), (2, 40321000), (4, 20160500), (5, 16128400), (8, 10080250), (10, 8064200), (16, 5040125), (20, 4032100), (25, 3225680), (40, 2016050), (50, 1612840), (61, 1322000), (80, 1008025), (100, 806420), (122, 661000), (125, 645136), (200, 403210), (244, 330500), (250, 322568), (305, 264400), (400, 201605), (488, 165250), (500, 161284), (610, 132200), (661, 122000), (976, 82625), (1000, 80642), (1220, 66100), (1322, 61000), (1525, 52880), (2000, 40321), (2440, 33050), (2644, 30500), (3050, 26440), (3305, 24400), (4880, 16525), (5288, 15250), (6100, 13220), (6610, 12200), (7625, 10576)]