21237700

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{449}}^1$

素因数の和:517

約数の個数: 72

約数和(自身を含む): 51559200

約数和(自身を除く): 30321500

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 43, 44, 50, 55, 86, 100, 110, 172, 215, 220, 275, 430, 449, 473, 550, 860, 898, 946, 1075, 1100, 1796, 1892, 2150, 2245, 2365, 4300, 4490, 4730, 4939, 8980, 9460, 9878, 11225, 11825, 19307, 19756, 22450, 23650, 24695, 38614, 44900, 47300, 49390, 77228, 96535, 98780, 123475, 193070, 212377, 246950, 386140, 424754, 482675, 493900, 849508, 965350, 1061885, 1930700, 2123770, 4247540, 5309425, 10618850, 21237700]

約数ペア:

[(1, 21237700), (2, 10618850), (4, 5309425), (5, 4247540), (10, 2123770), (11, 1930700), (20, 1061885), (22, 965350), (25, 849508), (43, 493900), (44, 482675), (50, 424754), (55, 386140), (86, 246950), (100, 212377), (110, 193070), (172, 123475), (215, 98780), (220, 96535), (275, 77228), (430, 49390), (449, 47300), (473, 44900), (550, 38614), (860, 24695), (898, 23650), (946, 22450), (1075, 19756), (1100, 19307), (1796, 11825), (1892, 11225), (2150, 9878), (2245, 9460), (2365, 8980), (4300, 4939), (4490, 4730)]