9990250

素因数分解:

$2^1\times 5^3\times {\mathrm{89}}^1\times {\mathrm{449}}^1$

素因数の和:555

約数の個数: 32

約数和(自身を含む): 18954000

約数和(自身を除く): 8963750

約数列:

[1, 2, 5, 10, 25, 50, 89, 125, 178, 250, 445, 449, 890, 898, 2225, 2245, 4450, 4490, 11125, 11225, 22250, 22450, 39961, 56125, 79922, 112250, 199805, 399610, 999025, 1998050, 4995125, 9990250]

約数ペア:

[(1, 9990250), (2, 4995125), (5, 1998050), (10, 999025), (25, 399610), (50, 199805), (89, 112250), (125, 79922), (178, 56125), (250, 39961), (445, 22450), (449, 22250), (890, 11225), (898, 11125), (2225, 4490), (2245, 4450)]