20323780

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{523}}^1$

素因数の和:628

約数の個数: 48

約数和(自身を含む): 44896320

約数和(自身を除く): 24572540

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 67, 116, 134, 145, 268, 290, 335, 523, 580, 670, 1046, 1340, 1943, 2092, 2615, 3886, 5230, 7772, 9715, 10460, 15167, 19430, 30334, 35041, 38860, 60668, 70082, 75835, 140164, 151670, 175205, 303340, 350410, 700820, 1016189, 2032378, 4064756, 5080945, 10161890, 20323780]

約数ペア:

[(1, 20323780), (2, 10161890), (4, 5080945), (5, 4064756), (10, 2032378), (20, 1016189), (29, 700820), (58, 350410), (67, 303340), (116, 175205), (134, 151670), (145, 140164), (268, 75835), (290, 70082), (335, 60668), (523, 38860), (580, 35041), (670, 30334), (1046, 19430), (1340, 15167), (1943, 10460), (2092, 9715), (2615, 7772), (3886, 5230)]