21103075

素因数分解:

$5^2\times 7^3\times {\mathrm{23}}^1\times {\mathrm{107}}^1$

素因数の和:161

約数の個数: 48

約数和(自身を含む): 32140800

約数和(自身を除く): 11037725

約数列:

[1, 5, 7, 23, 25, 35, 49, 107, 115, 161, 175, 245, 343, 535, 575, 749, 805, 1127, 1225, 1715, 2461, 2675, 3745, 4025, 5243, 5635, 7889, 8575, 12305, 17227, 18725, 26215, 28175, 36701, 39445, 61525, 86135, 120589, 131075, 183505, 197225, 430675, 602945, 844123, 917525, 3014725, 4220615, 21103075]

約数ペア:

[(1, 21103075), (5, 4220615), (7, 3014725), (23, 917525), (25, 844123), (35, 602945), (49, 430675), (107, 197225), (115, 183505), (161, 131075), (175, 120589), (245, 86135), (343, 61525), (535, 39445), (575, 36701), (749, 28175), (805, 26215), (1127, 18725), (1225, 17227), (1715, 12305), (2461, 8575), (2675, 7889), (3745, 5635), (4025, 5243)]