21804440

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{1811}}^1$

素因数の和:1872

約数の個数: 64

約数和(自身を含む): 57404160

約数和(自身を除く): 35599720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 43, 56, 70, 86, 140, 172, 215, 280, 301, 344, 430, 602, 860, 1204, 1505, 1720, 1811, 2408, 3010, 3622, 6020, 7244, 9055, 12040, 12677, 14488, 18110, 25354, 36220, 50708, 63385, 72440, 77873, 101416, 126770, 155746, 253540, 311492, 389365, 507080, 545111, 622984, 778730, 1090222, 1557460, 2180444, 2725555, 3114920, 4360888, 5451110, 10902220, 21804440]

約数ペア:

[(1, 21804440), (2, 10902220), (4, 5451110), (5, 4360888), (7, 3114920), (8, 2725555), (10, 2180444), (14, 1557460), (20, 1090222), (28, 778730), (35, 622984), (40, 545111), (43, 507080), (56, 389365), (70, 311492), (86, 253540), (140, 155746), (172, 126770), (215, 101416), (280, 77873), (301, 72440), (344, 63385), (430, 50708), (602, 36220), (860, 25354), (1204, 18110), (1505, 14488), (1720, 12677), (1811, 12040), (2408, 9055), (3010, 7244), (3622, 6020)]