81395840

素因数分解:

$2^7\times 5^1\times {\mathrm{89}}^1\times {\mathrm{1429}}^1$

素因数の和:1537

約数の個数: 64

約数和(自身を含む): 196911000

約数和(自身を除く): 115515160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 89, 128, 160, 178, 320, 356, 445, 640, 712, 890, 1424, 1429, 1780, 2848, 2858, 3560, 5696, 5716, 7120, 7145, 11392, 11432, 14240, 14290, 22864, 28480, 28580, 45728, 56960, 57160, 91456, 114320, 127181, 182912, 228640, 254362, 457280, 508724, 635905, 914560, 1017448, 1271810, 2034896, 2543620, 4069792, 5087240, 8139584, 10174480, 16279168, 20348960, 40697920, 81395840]

約数ペア:

[(1, 81395840), (2, 40697920), (4, 20348960), (5, 16279168), (8, 10174480), (10, 8139584), (16, 5087240), (20, 4069792), (32, 2543620), (40, 2034896), (64, 1271810), (80, 1017448), (89, 914560), (128, 635905), (160, 508724), (178, 457280), (320, 254362), (356, 228640), (445, 182912), (640, 127181), (712, 114320), (890, 91456), (1424, 57160), (1429, 56960), (1780, 45728), (2848, 28580), (2858, 28480), (3560, 22864), (5696, 14290), (5716, 14240), (7120, 11432), (7145, 11392)]