21090950

素因数分解:

$2^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{149}}^2$

素因数の和:329

約数の個数: 36

約数和(自身を含む): 41572860

約数和(自身を除く): 20481910

約数列:

[1, 2, 5, 10, 19, 25, 38, 50, 95, 149, 190, 298, 475, 745, 950, 1490, 2831, 3725, 5662, 7450, 14155, 22201, 28310, 44402, 70775, 111005, 141550, 222010, 421819, 555025, 843638, 1110050, 2109095, 4218190, 10545475, 21090950]

約数ペア:

[(1, 21090950), (2, 10545475), (5, 4218190), (10, 2109095), (19, 1110050), (25, 843638), (38, 555025), (50, 421819), (95, 222010), (149, 141550), (190, 111005), (298, 70775), (475, 44402), (745, 28310), (950, 22201), (1490, 14155), (2831, 7450), (3725, 5662)]