21040140

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{449}}^1$

素因数の和:543

約数の個数: 96

約数和(自身を含む): 65318400

約数和(自身を除く): 44278260

約数列:

[1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 20, 22, 30, 33, 44, 55, 60, 66, 71, 110, 132, 142, 165, 213, 220, 284, 330, 355, 426, 449, 660, 710, 781, 852, 898, 1065, 1347, 1420, 1562, 1796, 2130, 2245, 2343, 2694, 3124, 3905, 4260, 4490, 4686, 4939, 5388, 6735, 7810, 8980, 9372, 9878, 11715, 13470, 14817, 15620, 19756, 23430, 24695, 26940, 29634, 31879, 46860, 49390, 59268, 63758, 74085, 95637, 98780, 127516, 148170, 159395, 191274, 296340, 318790, 350669, 382548, 478185, 637580, 701338, 956370, 1052007, 1402676, 1753345, 1912740, 2104014, 3506690, 4208028, 5260035, 7013380, 10520070, 21040140]

約数ペア:

[(1, 21040140), (2, 10520070), (3, 7013380), (4, 5260035), (5, 4208028), (6, 3506690), (10, 2104014), (11, 1912740), (12, 1753345), (15, 1402676), (20, 1052007), (22, 956370), (30, 701338), (33, 637580), (44, 478185), (55, 382548), (60, 350669), (66, 318790), (71, 296340), (110, 191274), (132, 159395), (142, 148170), (165, 127516), (213, 98780), (220, 95637), (284, 74085), (330, 63758), (355, 59268), (426, 49390), (449, 46860), (660, 31879), (710, 29634), (781, 26940), (852, 24695), (898, 23430), (1065, 19756), (1347, 15620), (1420, 14817), (1562, 13470), (1796, 11715), (2130, 9878), (2245, 9372), (2343, 8980), (2694, 7810), (3124, 6735), (3905, 5388), (4260, 4939), (4490, 4686)]