21980525

素因数分解:

$5^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{127}}^1$

素因数の和:210

約数の個数: 48

約数和(自身を含む): 33521664

約数和(自身を除く): 11541139

約数列:

[1, 5, 7, 23, 25, 35, 43, 115, 127, 161, 175, 215, 301, 575, 635, 805, 889, 989, 1075, 1505, 2921, 3175, 4025, 4445, 4945, 5461, 6923, 7525, 14605, 20447, 22225, 24725, 27305, 34615, 38227, 73025, 102235, 125603, 136525, 173075, 191135, 511175, 628015, 879221, 955675, 3140075, 4396105, 21980525]

約数ペア:

[(1, 21980525), (5, 4396105), (7, 3140075), (23, 955675), (25, 879221), (35, 628015), (43, 511175), (115, 191135), (127, 173075), (161, 136525), (175, 125603), (215, 102235), (301, 73025), (575, 38227), (635, 34615), (805, 27305), (889, 24725), (989, 22225), (1075, 20447), (1505, 14605), (2921, 7525), (3175, 6923), (4025, 5461), (4445, 4945)]