21470820

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{67}}^1\times {\mathrm{109}}^1$

素因数の和:202

約数の個数: 144

約数和(自身を含む): 71628480

約数和(自身を除く): 50157660

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 67, 70, 84, 98, 105, 109, 134, 140, 147, 196, 201, 210, 218, 245, 268, 294, 327, 335, 402, 420, 436, 469, 490, 545, 588, 654, 670, 735, 763, 804, 938, 980, 1005, 1090, 1308, 1340, 1407, 1470, 1526, 1635, 1876, 2010, 2180, 2289, 2345, 2814, 2940, 3052, 3270, 3283, 3815, 4020, 4578, 4690, 5341, 5628, 6540, 6566, 7035, 7303, 7630, 9156, 9380, 9849, 10682, 11445, 13132, 14070, 14606, 15260, 16023, 16415, 19698, 21364, 21909, 22890, 26705, 28140, 29212, 32046, 32830, 36515, 39396, 43818, 45780, 49245, 51121, 53410, 64092, 65660, 73030, 80115, 87636, 98490, 102242, 106820, 109545, 146060, 153363, 160230, 196980, 204484, 219090, 255605, 306726, 320460, 357847, 438180, 511210, 613452, 715694, 766815, 1022420, 1073541, 1431388, 1533630, 1789235, 2147082, 3067260, 3578470, 4294164, 5367705, 7156940, 10735410, 21470820]

約数ペア:

[(1, 21470820), (2, 10735410), (3, 7156940), (4, 5367705), (5, 4294164), (6, 3578470), (7, 3067260), (10, 2147082), (12, 1789235), (14, 1533630), (15, 1431388), (20, 1073541), (21, 1022420), (28, 766815), (30, 715694), (35, 613452), (42, 511210), (49, 438180), (60, 357847), (67, 320460), (70, 306726), (84, 255605), (98, 219090), (105, 204484), (109, 196980), (134, 160230), (140, 153363), (147, 146060), (196, 109545), (201, 106820), (210, 102242), (218, 98490), (245, 87636), (268, 80115), (294, 73030), (327, 65660), (335, 64092), (402, 53410), (420, 51121), (436, 49245), (469, 45780), (490, 43818), (545, 39396), (588, 36515), (654, 32830), (670, 32046), (735, 29212), (763, 28140), (804, 26705), (938, 22890), (980, 21909), (1005, 21364), (1090, 19698), (1308, 16415), (1340, 16023), (1407, 15260), (1470, 14606), (1526, 14070), (1635, 13132), (1876, 11445), (2010, 10682), (2180, 9849), (2289, 9380), (2345, 9156), (2814, 7630), (2940, 7303), (3052, 7035), (3270, 6566), (3283, 6540), (3815, 5628), (4020, 5341), (4578, 4690)]