19999850

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{1061}}^1$

素因数の和:1115

約数の個数: 48

約数和(自身を含む): 41481720

約数和(自身を除く): 21481870

約数列:

[1, 2, 5, 10, 13, 25, 26, 29, 50, 58, 65, 130, 145, 290, 325, 377, 650, 725, 754, 1061, 1450, 1885, 2122, 3770, 5305, 9425, 10610, 13793, 18850, 26525, 27586, 30769, 53050, 61538, 68965, 137930, 153845, 307690, 344825, 399997, 689650, 769225, 799994, 1538450, 1999985, 3999970, 9999925, 19999850]

約数ペア:

[(1, 19999850), (2, 9999925), (5, 3999970), (10, 1999985), (13, 1538450), (25, 799994), (26, 769225), (29, 689650), (50, 399997), (58, 344825), (65, 307690), (130, 153845), (145, 137930), (290, 68965), (325, 61538), (377, 53050), (650, 30769), (725, 27586), (754, 26525), (1061, 18850), (1450, 13793), (1885, 10610), (2122, 9425), (3770, 5305)]