256990160

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1$

素因数の和:293

約数の個数: 160

約数和(自身を含む): 714716160

約数和(自身を除く): 457726000

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 37, 40, 56, 70, 74, 79, 80, 112, 140, 148, 157, 158, 185, 259, 280, 296, 314, 316, 370, 395, 518, 553, 560, 592, 628, 632, 740, 785, 790, 1036, 1099, 1106, 1256, 1264, 1295, 1480, 1570, 1580, 2072, 2198, 2212, 2512, 2590, 2765, 2923, 2960, 3140, 3160, 4144, 4396, 4424, 5180, 5495, 5530, 5809, 5846, 6280, 6320, 8792, 8848, 10360, 10990, 11060, 11618, 11692, 12403, 12560, 14615, 17584, 20461, 20720, 21980, 22120, 23236, 23384, 24806, 29045, 29230, 40663, 40922, 43960, 44240, 46472, 46768, 49612, 58090, 58460, 62015, 81326, 81844, 86821, 87920, 92944, 99224, 102305, 116180, 116920, 124030, 162652, 163688, 173642, 198448, 203315, 204610, 232360, 233840, 248060, 325304, 327376, 347284, 406630, 409220, 434105, 458911, 464720, 496120, 650608, 694568, 813260, 818440, 868210, 917822, 992240, 1389136, 1626520, 1636880, 1736420, 1835644, 2294555, 3212377, 3253040, 3472840, 3671288, 4589110, 6424754, 6945680, 7342576, 9178220, 12849508, 16061885, 18356440, 25699016, 32123770, 36712880, 51398032, 64247540, 128495080, 256990160]

約数ペア:

[(1, 256990160), (2, 128495080), (4, 64247540), (5, 51398032), (7, 36712880), (8, 32123770), (10, 25699016), (14, 18356440), (16, 16061885), (20, 12849508), (28, 9178220), (35, 7342576), (37, 6945680), (40, 6424754), (56, 4589110), (70, 3671288), (74, 3472840), (79, 3253040), (80, 3212377), (112, 2294555), (140, 1835644), (148, 1736420), (157, 1636880), (158, 1626520), (185, 1389136), (259, 992240), (280, 917822), (296, 868210), (314, 818440), (316, 813260), (370, 694568), (395, 650608), (518, 496120), (553, 464720), (560, 458911), (592, 434105), (628, 409220), (632, 406630), (740, 347284), (785, 327376), (790, 325304), (1036, 248060), (1099, 233840), (1106, 232360), (1256, 204610), (1264, 203315), (1295, 198448), (1480, 173642), (1570, 163688), (1580, 162652), (2072, 124030), (2198, 116920), (2212, 116180), (2512, 102305), (2590, 99224), (2765, 92944), (2923, 87920), (2960, 86821), (3140, 81844), (3160, 81326), (4144, 62015), (4396, 58460), (4424, 58090), (5180, 49612), (5495, 46768), (5530, 46472), (5809, 44240), (5846, 43960), (6280, 40922), (6320, 40663), (8792, 29230), (8848, 29045), (10360, 24806), (10990, 23384), (11060, 23236), (11618, 22120), (11692, 21980), (12403, 20720), (12560, 20461), (14615, 17584)]