21204095

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{197}}^1$

素因数の和:335

約数の個数: 32

約数和(自身を含む): 29652480

約数和(自身を除く): 8448385

約数列:

[1, 5, 11, 19, 55, 95, 103, 197, 209, 515, 985, 1045, 1133, 1957, 2167, 3743, 5665, 9785, 10835, 18715, 20291, 21527, 41173, 101455, 107635, 205865, 223201, 385529, 1116005, 1927645, 4240819, 21204095]

約数ペア:

[(1, 21204095), (5, 4240819), (11, 1927645), (19, 1116005), (55, 385529), (95, 223201), (103, 205865), (197, 107635), (209, 101455), (515, 41173), (985, 21527), (1045, 20291), (1133, 18715), (1957, 10835), (2167, 9785), (3743, 5665)]