21851725

素因数分解:

$5^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1$

素因数の和:190

約数の個数: 48

約数和(自身を含む): 33212160

約数和(自身を除く): 11360435

約数列:

[1, 5, 7, 23, 25, 35, 61, 89, 115, 161, 175, 305, 427, 445, 575, 623, 805, 1403, 1525, 2047, 2135, 2225, 3115, 4025, 5429, 7015, 9821, 10235, 10675, 14329, 15575, 27145, 35075, 38003, 49105, 51175, 71645, 124867, 135725, 190015, 245525, 358225, 624335, 874069, 950075, 3121675, 4370345, 21851725]

約数ペア:

[(1, 21851725), (5, 4370345), (7, 3121675), (23, 950075), (25, 874069), (35, 624335), (61, 358225), (89, 245525), (115, 190015), (161, 135725), (175, 124867), (305, 71645), (427, 51175), (445, 49105), (575, 38003), (623, 35075), (805, 27145), (1403, 15575), (1525, 14329), (2047, 10675), (2135, 10235), (2225, 9821), (3115, 7015), (4025, 5429)]