20319140

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{661}}^1$

素因数の和:752

約数の個数: 48

約数和(自身を含む): 45042480

約数和(自身を除く): 24723340

約数列:

[1, 2, 4, 5, 10, 20, 29, 53, 58, 106, 116, 145, 212, 265, 290, 530, 580, 661, 1060, 1322, 1537, 2644, 3074, 3305, 6148, 6610, 7685, 13220, 15370, 19169, 30740, 35033, 38338, 70066, 76676, 95845, 140132, 175165, 191690, 350330, 383380, 700660, 1015957, 2031914, 4063828, 5079785, 10159570, 20319140]

約数ペア:

[(1, 20319140), (2, 10159570), (4, 5079785), (5, 4063828), (10, 2031914), (20, 1015957), (29, 700660), (53, 383380), (58, 350330), (106, 191690), (116, 175165), (145, 140132), (212, 95845), (265, 76676), (290, 70066), (530, 38338), (580, 35033), (661, 30740), (1060, 19169), (1322, 15370), (1537, 13220), (2644, 7685), (3074, 6610), (3305, 6148)]