28302020

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{1049}}^1$

素因数の和:1148

約数の個数: 48

約数和(自身を含む): 63504000

約数和(自身を除く): 35201980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 71, 76, 95, 142, 190, 284, 355, 380, 710, 1049, 1349, 1420, 2098, 2698, 4196, 5245, 5396, 6745, 10490, 13490, 19931, 20980, 26980, 39862, 74479, 79724, 99655, 148958, 199310, 297916, 372395, 398620, 744790, 1415101, 1489580, 2830202, 5660404, 7075505, 14151010, 28302020]

約数ペア:

[(1, 28302020), (2, 14151010), (4, 7075505), (5, 5660404), (10, 2830202), (19, 1489580), (20, 1415101), (38, 744790), (71, 398620), (76, 372395), (95, 297916), (142, 199310), (190, 148958), (284, 99655), (355, 79724), (380, 74479), (710, 39862), (1049, 26980), (1349, 20980), (1420, 19931), (2098, 13490), (2698, 10490), (4196, 6745), (5245, 5396)]