81377600

素因数分解:

$2^6\times 5^2\times {\mathrm{181}}^1\times {\mathrm{281}}^1$

素因数の和:484

約数の個数: 84

約数和(自身を含む): 202062588

約数和(自身を除く): 120684988

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 160, 181, 200, 281, 320, 362, 400, 562, 724, 800, 905, 1124, 1405, 1448, 1600, 1810, 2248, 2810, 2896, 3620, 4496, 4525, 5620, 5792, 7025, 7240, 8992, 9050, 11240, 11584, 14050, 14480, 17984, 18100, 22480, 28100, 28960, 36200, 44960, 50861, 56200, 57920, 72400, 89920, 101722, 112400, 144800, 203444, 224800, 254305, 289600, 406888, 449600, 508610, 813776, 1017220, 1271525, 1627552, 2034440, 2543050, 3255104, 4068880, 5086100, 8137760, 10172200, 16275520, 20344400, 40688800, 81377600]

約数ペア:

[(1, 81377600), (2, 40688800), (4, 20344400), (5, 16275520), (8, 10172200), (10, 8137760), (16, 5086100), (20, 4068880), (25, 3255104), (32, 2543050), (40, 2034440), (50, 1627552), (64, 1271525), (80, 1017220), (100, 813776), (160, 508610), (181, 449600), (200, 406888), (281, 289600), (320, 254305), (362, 224800), (400, 203444), (562, 144800), (724, 112400), (800, 101722), (905, 89920), (1124, 72400), (1405, 57920), (1448, 56200), (1600, 50861), (1810, 44960), (2248, 36200), (2810, 28960), (2896, 28100), (3620, 22480), (4496, 18100), (4525, 17984), (5620, 14480), (5792, 14050), (7025, 11584), (7240, 11240), (8992, 9050)]