20040490640

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{351341}}^1$

素因数の和:351408

約数の個数: 80

約数和(自身を含む): 50188502016

約数和(自身を除く): 30148011376

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 31, 40, 46, 62, 80, 92, 115, 124, 155, 184, 230, 248, 310, 368, 460, 496, 620, 713, 920, 1240, 1426, 1840, 2480, 2852, 3565, 5704, 7130, 11408, 14260, 28520, 57040, 351341, 702682, 1405364, 1756705, 2810728, 3513410, 5621456, 7026820, 8080843, 10891571, 14053640, 16161686, 21783142, 28107280, 32323372, 40404215, 43566284, 54457855, 64646744, 80808430, 87132568, 108915710, 129293488, 161616860, 174265136, 217831420, 250506133, 323233720, 435662840, 501012266, 646467440, 871325680, 1002024532, 1252530665, 2004049064, 2505061330, 4008098128, 5010122660, 10020245320, 20040490640]

約数ペア:

[(1, 20040490640), (2, 10020245320), (4, 5010122660), (5, 4008098128), (8, 2505061330), (10, 2004049064), (16, 1252530665), (20, 1002024532), (23, 871325680), (31, 646467440), (40, 501012266), (46, 435662840), (62, 323233720), (80, 250506133), (92, 217831420), (115, 174265136), (124, 161616860), (155, 129293488), (184, 108915710), (230, 87132568), (248, 80808430), (310, 64646744), (368, 54457855), (460, 43566284), (496, 40404215), (620, 32323372), (713, 28107280), (920, 21783142), (1240, 16161686), (1426, 14053640), (1840, 10891571), (2480, 8080843), (2852, 7026820), (3565, 5621456), (5704, 3513410), (7130, 2810728), (11408, 1756705), (14260, 1405364), (28520, 702682), (57040, 351341)]