201520720

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{2087}}^1$

素因数の和:2188

約数の個数: 80

約数和(自身を含む): 503324928

約数和(自身を除く): 301804208

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 71, 80, 85, 136, 142, 170, 272, 284, 340, 355, 568, 680, 710, 1136, 1207, 1360, 1420, 2087, 2414, 2840, 4174, 4828, 5680, 6035, 8348, 9656, 10435, 12070, 16696, 19312, 20870, 24140, 33392, 35479, 41740, 48280, 70958, 83480, 96560, 141916, 148177, 166960, 177395, 283832, 296354, 354790, 567664, 592708, 709580, 740885, 1185416, 1419160, 1481770, 2370832, 2519009, 2838320, 2963540, 5038018, 5927080, 10076036, 11854160, 12595045, 20152072, 25190090, 40304144, 50380180, 100760360, 201520720]

約数ペア:

[(1, 201520720), (2, 100760360), (4, 50380180), (5, 40304144), (8, 25190090), (10, 20152072), (16, 12595045), (17, 11854160), (20, 10076036), (34, 5927080), (40, 5038018), (68, 2963540), (71, 2838320), (80, 2519009), (85, 2370832), (136, 1481770), (142, 1419160), (170, 1185416), (272, 740885), (284, 709580), (340, 592708), (355, 567664), (568, 354790), (680, 296354), (710, 283832), (1136, 177395), (1207, 166960), (1360, 148177), (1420, 141916), (2087, 96560), (2414, 83480), (2840, 70958), (4174, 48280), (4828, 41740), (5680, 35479), (6035, 33392), (8348, 24140), (9656, 20870), (10435, 19312), (12070, 16696)]