21127225

素因数分解:

$5^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{181}}^1$

素因数の和:250

約数の個数: 48

約数和(自身を含む): 32497920

約数和(自身を除く): 11370695

約数列:

[1, 5, 7, 23, 25, 29, 35, 115, 145, 161, 175, 181, 203, 575, 667, 725, 805, 905, 1015, 1267, 3335, 4025, 4163, 4525, 4669, 5075, 5249, 6335, 16675, 20815, 23345, 26245, 29141, 31675, 36743, 104075, 116725, 120727, 131225, 145705, 183715, 603635, 728525, 845089, 918575, 3018175, 4225445, 21127225]

約数ペア:

[(1, 21127225), (5, 4225445), (7, 3018175), (23, 918575), (25, 845089), (29, 728525), (35, 603635), (115, 183715), (145, 145705), (161, 131225), (175, 120727), (181, 116725), (203, 104075), (575, 36743), (667, 31675), (725, 29141), (805, 26245), (905, 23345), (1015, 20815), (1267, 16675), (3335, 6335), (4025, 5249), (4163, 5075), (4525, 4669)]