21307715

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1753}}^1$

素因数の和:1799

約数の個数: 32

約数和(自身を含む): 31824576

約数和(自身を除く): 10516861

約数列:

[1, 5, 11, 13, 17, 55, 65, 85, 143, 187, 221, 715, 935, 1105, 1753, 2431, 8765, 12155, 19283, 22789, 29801, 96415, 113945, 149005, 250679, 327811, 387413, 1253395, 1639055, 1937065, 4261543, 21307715]

約数ペア:

[(1, 21307715), (5, 4261543), (11, 1937065), (13, 1639055), (17, 1253395), (55, 387413), (65, 327811), (85, 250679), (143, 149005), (187, 113945), (221, 96415), (715, 29801), (935, 22789), (1105, 19283), (1753, 12155), (2431, 8765)]