21805100

素因数分解:

$2^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{103}}^1$

素因数の和:219

約数の個数: 72

約数和(自身を含む): 50100960

約数和(自身を除く): 28295860

約数列:

[1, 2, 4, 5, 10, 20, 25, 29, 50, 58, 73, 100, 103, 116, 145, 146, 206, 290, 292, 365, 412, 515, 580, 725, 730, 1030, 1450, 1460, 1825, 2060, 2117, 2575, 2900, 2987, 3650, 4234, 5150, 5974, 7300, 7519, 8468, 10300, 10585, 11948, 14935, 15038, 21170, 29870, 30076, 37595, 42340, 52925, 59740, 74675, 75190, 105850, 149350, 150380, 187975, 211700, 218051, 298700, 375950, 436102, 751900, 872204, 1090255, 2180510, 4361020, 5451275, 10902550, 21805100]

約数ペア:

[(1, 21805100), (2, 10902550), (4, 5451275), (5, 4361020), (10, 2180510), (20, 1090255), (25, 872204), (29, 751900), (50, 436102), (58, 375950), (73, 298700), (100, 218051), (103, 211700), (116, 187975), (145, 150380), (146, 149350), (206, 105850), (290, 75190), (292, 74675), (365, 59740), (412, 52925), (515, 42340), (580, 37595), (725, 30076), (730, 29870), (1030, 21170), (1450, 15038), (1460, 14935), (1825, 11948), (2060, 10585), (2117, 10300), (2575, 8468), (2900, 7519), (2987, 7300), (3650, 5974), (4234, 5150)]