19996900

素因数分解:

$2^2\times 5^2\times 7^3\times {\mathrm{11}}^1\times {\mathrm{53}}^1$

素因数の和:99

約数の個数: 144

約数和(自身を含む): 56246400

約数和(自身を除く): 36249500

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 25, 28, 35, 44, 49, 50, 53, 55, 70, 77, 98, 100, 106, 110, 140, 154, 175, 196, 212, 220, 245, 265, 275, 308, 343, 350, 371, 385, 490, 530, 539, 550, 583, 686, 700, 742, 770, 980, 1060, 1078, 1100, 1166, 1225, 1325, 1372, 1484, 1540, 1715, 1855, 1925, 2156, 2332, 2450, 2597, 2650, 2695, 2915, 3430, 3710, 3773, 3850, 4081, 4900, 5194, 5300, 5390, 5830, 6860, 7420, 7546, 7700, 8162, 8575, 9275, 10388, 10780, 11660, 12985, 13475, 14575, 15092, 16324, 17150, 18179, 18550, 18865, 20405, 25970, 26950, 28567, 29150, 34300, 36358, 37100, 37730, 40810, 51940, 53900, 57134, 58300, 64925, 72716, 75460, 81620, 90895, 94325, 102025, 114268, 129850, 142835, 181790, 188650, 199969, 204050, 259700, 285670, 363580, 377300, 399938, 408100, 454475, 571340, 714175, 799876, 908950, 999845, 1428350, 1817900, 1999690, 2856700, 3999380, 4999225, 9998450, 19996900]

約数ペア:

[(1, 19996900), (2, 9998450), (4, 4999225), (5, 3999380), (7, 2856700), (10, 1999690), (11, 1817900), (14, 1428350), (20, 999845), (22, 908950), (25, 799876), (28, 714175), (35, 571340), (44, 454475), (49, 408100), (50, 399938), (53, 377300), (55, 363580), (70, 285670), (77, 259700), (98, 204050), (100, 199969), (106, 188650), (110, 181790), (140, 142835), (154, 129850), (175, 114268), (196, 102025), (212, 94325), (220, 90895), (245, 81620), (265, 75460), (275, 72716), (308, 64925), (343, 58300), (350, 57134), (371, 53900), (385, 51940), (490, 40810), (530, 37730), (539, 37100), (550, 36358), (583, 34300), (686, 29150), (700, 28567), (742, 26950), (770, 25970), (980, 20405), (1060, 18865), (1078, 18550), (1100, 18179), (1166, 17150), (1225, 16324), (1325, 15092), (1372, 14575), (1484, 13475), (1540, 12985), (1715, 11660), (1855, 10780), (1925, 10388), (2156, 9275), (2332, 8575), (2450, 8162), (2597, 7700), (2650, 7546), (2695, 7420), (2915, 6860), (3430, 5830), (3710, 5390), (3773, 5300), (3850, 5194), (4081, 4900)]