21191500

素因数分解:

$2^2\times 5^3\times {\mathrm{11}}^1\times {\mathrm{3853}}^1$

素因数の和:3883

約数の個数: 48

約数和(自身を含む): 50502816

約数和(自身を除く): 29311316

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 100, 110, 125, 220, 250, 275, 500, 550, 1100, 1375, 2750, 3853, 5500, 7706, 15412, 19265, 38530, 42383, 77060, 84766, 96325, 169532, 192650, 211915, 385300, 423830, 481625, 847660, 963250, 1059575, 1926500, 2119150, 4238300, 5297875, 10595750, 21191500]

約数ペア:

[(1, 21191500), (2, 10595750), (4, 5297875), (5, 4238300), (10, 2119150), (11, 1926500), (20, 1059575), (22, 963250), (25, 847660), (44, 481625), (50, 423830), (55, 385300), (100, 211915), (110, 192650), (125, 169532), (220, 96325), (250, 84766), (275, 77060), (500, 42383), (550, 38530), (1100, 19265), (1375, 15412), (2750, 7706), (3853, 5500)]