638961080

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{269}}^1\times {\mathrm{1381}}^1$

素因数の和:1704

約数の個数: 64

約数和(自身を含む): 1477634400

約数和(自身を除く): 838673320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 269, 344, 430, 538, 860, 1076, 1345, 1381, 1720, 2152, 2690, 2762, 5380, 5524, 6905, 10760, 11048, 11567, 13810, 23134, 27620, 46268, 55240, 57835, 59383, 92536, 115670, 118766, 231340, 237532, 296915, 371489, 462680, 475064, 593830, 742978, 1187660, 1485956, 1857445, 2375320, 2971912, 3714890, 7429780, 14859560, 15974027, 31948054, 63896108, 79870135, 127792216, 159740270, 319480540, 638961080]

約数ペア:

[(1, 638961080), (2, 319480540), (4, 159740270), (5, 127792216), (8, 79870135), (10, 63896108), (20, 31948054), (40, 15974027), (43, 14859560), (86, 7429780), (172, 3714890), (215, 2971912), (269, 2375320), (344, 1857445), (430, 1485956), (538, 1187660), (860, 742978), (1076, 593830), (1345, 475064), (1381, 462680), (1720, 371489), (2152, 296915), (2690, 237532), (2762, 231340), (5380, 118766), (5524, 115670), (6905, 92536), (10760, 59383), (11048, 57835), (11567, 55240), (13810, 46268), (23134, 27620)]