98780020

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{101}}^1\times {\mathrm{619}}^1$

素因数の和:808

約数の個数: 48

約数和(自身を含む): 212486400

約数和(自身を除く): 113706380

約数列:

[1, 2, 4, 5, 10, 20, 79, 101, 158, 202, 316, 395, 404, 505, 619, 790, 1010, 1238, 1580, 2020, 2476, 3095, 6190, 7979, 12380, 15958, 31916, 39895, 48901, 62519, 79790, 97802, 125038, 159580, 195604, 244505, 250076, 312595, 489010, 625190, 978020, 1250380, 4939001, 9878002, 19756004, 24695005, 49390010, 98780020]

約数ペア:

[(1, 98780020), (2, 49390010), (4, 24695005), (5, 19756004), (10, 9878002), (20, 4939001), (79, 1250380), (101, 978020), (158, 625190), (202, 489010), (316, 312595), (395, 250076), (404, 244505), (505, 195604), (619, 159580), (790, 125038), (1010, 97802), (1238, 79790), (1580, 62519), (2020, 48901), (2476, 39895), (3095, 31916), (6190, 15958), (7979, 12380)]