81977000

素因数分解:

$2^3\times 5^3\times 7^3\times {\mathrm{239}}^1$

素因数の和:281

約数の個数: 128

約数和(自身を含む): 224640000

約数和(自身を除く): 142663000

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 49, 50, 56, 70, 98, 100, 125, 140, 175, 196, 200, 239, 245, 250, 280, 343, 350, 392, 478, 490, 500, 686, 700, 875, 956, 980, 1000, 1195, 1225, 1372, 1400, 1673, 1715, 1750, 1912, 1960, 2390, 2450, 2744, 3346, 3430, 3500, 4780, 4900, 5975, 6125, 6692, 6860, 7000, 8365, 8575, 9560, 9800, 11711, 11950, 12250, 13384, 13720, 16730, 17150, 23422, 23900, 24500, 29875, 33460, 34300, 41825, 42875, 46844, 47800, 49000, 58555, 59750, 66920, 68600, 81977, 83650, 85750, 93688, 117110, 119500, 163954, 167300, 171500, 209125, 234220, 239000, 292775, 327908, 334600, 343000, 409885, 418250, 468440, 585550, 655816, 819770, 836500, 1171100, 1463875, 1639540, 1673000, 2049425, 2342200, 2927750, 3279080, 4098850, 5855500, 8197700, 10247125, 11711000, 16395400, 20494250, 40988500, 81977000]

約数ペア:

[(1, 81977000), (2, 40988500), (4, 20494250), (5, 16395400), (7, 11711000), (8, 10247125), (10, 8197700), (14, 5855500), (20, 4098850), (25, 3279080), (28, 2927750), (35, 2342200), (40, 2049425), (49, 1673000), (50, 1639540), (56, 1463875), (70, 1171100), (98, 836500), (100, 819770), (125, 655816), (140, 585550), (175, 468440), (196, 418250), (200, 409885), (239, 343000), (245, 334600), (250, 327908), (280, 292775), (343, 239000), (350, 234220), (392, 209125), (478, 171500), (490, 167300), (500, 163954), (686, 119500), (700, 117110), (875, 93688), (956, 85750), (980, 83650), (1000, 81977), (1195, 68600), (1225, 66920), (1372, 59750), (1400, 58555), (1673, 49000), (1715, 47800), (1750, 46844), (1912, 42875), (1960, 41825), (2390, 34300), (2450, 33460), (2744, 29875), (3346, 24500), (3430, 23900), (3500, 23422), (4780, 17150), (4900, 16730), (5975, 13720), (6125, 13384), (6692, 12250), (6860, 11950), (7000, 11711), (8365, 9800), (8575, 9560)]