31221561

素因数分解:

$3^1\times 7^1\times {\mathrm{59}}^1\times {\mathrm{113}}^1\times {\mathrm{223}}^1$

素因数の和:405

約数の個数: 32

約数和(自身を含む): 49029120

約数和(自身を除く): 17807559

約数列:

[1, 3, 7, 21, 59, 113, 177, 223, 339, 413, 669, 791, 1239, 1561, 2373, 4683, 6667, 13157, 20001, 25199, 39471, 46669, 75597, 92099, 140007, 176393, 276297, 529179, 1486741, 4460223, 10407187, 31221561]

約数ペア:

[(1, 31221561), (3, 10407187), (7, 4460223), (21, 1486741), (59, 529179), (113, 276297), (177, 176393), (223, 140007), (339, 92099), (413, 75597), (669, 46669), (791, 39471), (1239, 25199), (1561, 20001), (2373, 13157), (4683, 6667)]