256885120

素因数分解:

$2^7\times 5^1\times {\mathrm{199}}^1\times {\mathrm{2017}}^1$

素因数の和:2235

約数の個数: 64

約数和(自身を含む): 617508000

約数和(自身を除く): 360622880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 199, 320, 398, 640, 796, 995, 1592, 1990, 2017, 3184, 3980, 4034, 6368, 7960, 8068, 10085, 12736, 15920, 16136, 20170, 25472, 31840, 32272, 40340, 63680, 64544, 80680, 127360, 129088, 161360, 258176, 322720, 401383, 645440, 802766, 1290880, 1605532, 2006915, 3211064, 4013830, 6422128, 8027660, 12844256, 16055320, 25688512, 32110640, 51377024, 64221280, 128442560, 256885120]

約数ペア:

[(1, 256885120), (2, 128442560), (4, 64221280), (5, 51377024), (8, 32110640), (10, 25688512), (16, 16055320), (20, 12844256), (32, 8027660), (40, 6422128), (64, 4013830), (80, 3211064), (128, 2006915), (160, 1605532), (199, 1290880), (320, 802766), (398, 645440), (640, 401383), (796, 322720), (995, 258176), (1592, 161360), (1990, 129088), (2017, 127360), (3184, 80680), (3980, 64544), (4034, 63680), (6368, 40340), (7960, 32272), (8068, 31840), (10085, 25472), (12736, 20170), (15920, 16136)]