16620020

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1$

素因数の和:312

約数の個数: 48

約数和(自身を含む): 36099840

約数和(自身を除く): 19479820

約数列:

[1, 2, 4, 5, 10, 20, 67, 79, 134, 157, 158, 268, 314, 316, 335, 395, 628, 670, 785, 790, 1340, 1570, 1580, 3140, 5293, 10519, 10586, 12403, 21038, 21172, 24806, 26465, 42076, 49612, 52595, 52930, 62015, 105190, 105860, 124030, 210380, 248060, 831001, 1662002, 3324004, 4155005, 8310010, 16620020]

約数ペア:

[(1, 16620020), (2, 8310010), (4, 4155005), (5, 3324004), (10, 1662002), (20, 831001), (67, 248060), (79, 210380), (134, 124030), (157, 105860), (158, 105190), (268, 62015), (314, 52930), (316, 52595), (335, 49612), (395, 42076), (628, 26465), (670, 24806), (785, 21172), (790, 21038), (1340, 12403), (1570, 10586), (1580, 10519), (3140, 5293)]