21000388700

素因数分解:

$2^2\times 5^2\times {\mathrm{1493}}^1\times {\mathrm{140659}}^1$

素因数の和:142166

約数の個数: 36

約数和(自身を含む): 45601690680

約数和(自身を除く): 24601301980

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 1493, 2986, 5972, 7465, 14930, 29860, 37325, 74650, 140659, 149300, 281318, 562636, 703295, 1406590, 2813180, 3516475, 7032950, 14065900, 210003887, 420007774, 840015548, 1050019435, 2100038870, 4200077740, 5250097175, 10500194350, 21000388700]

約数ペア:

[(1, 21000388700), (2, 10500194350), (4, 5250097175), (5, 4200077740), (10, 2100038870), (20, 1050019435), (25, 840015548), (50, 420007774), (100, 210003887), (1493, 14065900), (2986, 7032950), (5972, 3516475), (7465, 2813180), (14930, 1406590), (29860, 703295), (37325, 562636), (74650, 281318), (140659, 149300)]