20291515

素因数分解:

$5^1\times {\mathrm{31}}^2\times {\mathrm{41}}^1\times {\mathrm{103}}^1$

素因数の和:211

約数の個数: 24

約数和(自身を含む): 26024544

約数和(自身を除く): 5733029

約数列:

[1, 5, 31, 41, 103, 155, 205, 515, 961, 1271, 3193, 4223, 4805, 6355, 15965, 21115, 39401, 98983, 130913, 197005, 494915, 654565, 4058303, 20291515]

約数ペア:

[(1, 20291515), (5, 4058303), (31, 654565), (41, 494915), (103, 197005), (155, 130913), (205, 98983), (515, 39401), (961, 21115), (1271, 15965), (3193, 6355), (4223, 4805)]