21015500

素因数分解:

$2^2\times 5^3\times {\mathrm{11}}^1\times {\mathrm{3821}}^1$

素因数の和:3851

約数の個数: 48

約数和(自身を含む): 50083488

約数和(自身を除く): 29067988

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, 3821, 5500, 7642, 15284, 19105, 38210, 42031, 76420, 84062, 95525, 168124, 191050, 210155, 382100, 420310, 477625, 840620, 955250, 1050775, 1910500, 2101550, 4203100, 5253875, 10507750, 21015500]

約数ペア:

[(1, 21015500), (2, 10507750), (4, 5253875), (5, 4203100), (10, 2101550), (11, 1910500), (20, 1050775), (22, 955250), (25, 840620), (44, 477625), (50, 420310), (55, 382100), (100, 210155), (110, 191050), (125, 168124), (220, 95525), (250, 84062), (275, 76420), (500, 42031), (550, 38210), (1100, 19105), (1375, 15284), (2750, 7642), (3821, 5500)]