81219840

素因数分解:

$2^8\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1627}}^1$

素因数の和:1664

約数の個数: 144

約数和(自身を含む): 279521088

約数和(自身を除く): 198301248

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 32, 39, 40, 48, 52, 60, 64, 65, 78, 80, 96, 104, 120, 128, 130, 156, 160, 192, 195, 208, 240, 256, 260, 312, 320, 384, 390, 416, 480, 520, 624, 640, 768, 780, 832, 960, 1040, 1248, 1280, 1560, 1627, 1664, 1920, 2080, 2496, 3120, 3254, 3328, 3840, 4160, 4881, 4992, 6240, 6508, 8135, 8320, 9762, 9984, 12480, 13016, 16270, 16640, 19524, 21151, 24405, 24960, 26032, 32540, 39048, 42302, 48810, 49920, 52064, 63453, 65080, 78096, 84604, 97620, 104128, 105755, 126906, 130160, 156192, 169208, 195240, 208256, 211510, 253812, 260320, 312384, 317265, 338416, 390480, 416512, 423020, 507624, 520640, 624768, 634530, 676832, 780960, 846040, 1015248, 1041280, 1249536, 1269060, 1353664, 1561920, 1692080, 2030496, 2082560, 2538120, 2707328, 3123840, 3384160, 4060992, 5076240, 5414656, 6247680, 6768320, 8121984, 10152480, 13536640, 16243968, 20304960, 27073280, 40609920, 81219840]

約数ペア:

[(1, 81219840), (2, 40609920), (3, 27073280), (4, 20304960), (5, 16243968), (6, 13536640), (8, 10152480), (10, 8121984), (12, 6768320), (13, 6247680), (15, 5414656), (16, 5076240), (20, 4060992), (24, 3384160), (26, 3123840), (30, 2707328), (32, 2538120), (39, 2082560), (40, 2030496), (48, 1692080), (52, 1561920), (60, 1353664), (64, 1269060), (65, 1249536), (78, 1041280), (80, 1015248), (96, 846040), (104, 780960), (120, 676832), (128, 634530), (130, 624768), (156, 520640), (160, 507624), (192, 423020), (195, 416512), (208, 390480), (240, 338416), (256, 317265), (260, 312384), (312, 260320), (320, 253812), (384, 211510), (390, 208256), (416, 195240), (480, 169208), (520, 156192), (624, 130160), (640, 126906), (768, 105755), (780, 104128), (832, 97620), (960, 84604), (1040, 78096), (1248, 65080), (1280, 63453), (1560, 52064), (1627, 49920), (1664, 48810), (1920, 42302), (2080, 39048), (2496, 32540), (3120, 26032), (3254, 24960), (3328, 24405), (3840, 21151), (4160, 19524), (4881, 16640), (4992, 16270), (6240, 13016), (6508, 12480), (8135, 9984), (8320, 9762)]