21135275

素因数分解:

$5^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{89}}^1$

素因数の和:188

約数の個数: 48

約数和(自身を含む): 32140800

約数和(自身を除く): 11005525

約数列:

[1, 5, 7, 23, 25, 35, 59, 89, 115, 161, 175, 295, 413, 445, 575, 623, 805, 1357, 1475, 2047, 2065, 2225, 3115, 4025, 5251, 6785, 9499, 10235, 10325, 14329, 15575, 26255, 33925, 36757, 47495, 51175, 71645, 120773, 131275, 183785, 237475, 358225, 603865, 845411, 918925, 3019325, 4227055, 21135275]

約数ペア:

[(1, 21135275), (5, 4227055), (7, 3019325), (23, 918925), (25, 845411), (35, 603865), (59, 358225), (89, 237475), (115, 183785), (161, 131275), (175, 120773), (295, 71645), (413, 51175), (445, 47495), (575, 36757), (623, 33925), (805, 26255), (1357, 15575), (1475, 14329), (2047, 10325), (2065, 10235), (2225, 9499), (3115, 6785), (4025, 5251)]