638533420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{123269}}^1$

素因数の和:123322

約数の個数: 48

約数和(自身を含む): 1573911360

約数和(自身を除く): 935377940

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 70, 74, 140, 148, 185, 259, 370, 518, 740, 1036, 1295, 2590, 5180, 123269, 246538, 493076, 616345, 862883, 1232690, 1725766, 2465380, 3451532, 4314415, 4560953, 8628830, 9121906, 17257660, 18243812, 22804765, 31926671, 45609530, 63853342, 91219060, 127706684, 159633355, 319266710, 638533420]

約数ペア:

[(1, 638533420), (2, 319266710), (4, 159633355), (5, 127706684), (7, 91219060), (10, 63853342), (14, 45609530), (20, 31926671), (28, 22804765), (35, 18243812), (37, 17257660), (70, 9121906), (74, 8628830), (140, 4560953), (148, 4314415), (185, 3451532), (259, 2465380), (370, 1725766), (518, 1232690), (740, 862883), (1036, 616345), (1295, 493076), (2590, 246538), (5180, 123269)]