21429660

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{197}}^1$

素因数の和:260

約数の個数: 144

約数和(自身を含む): 72049824

約数和(自身を除く): 50620164

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 37, 42, 49, 60, 70, 74, 84, 98, 105, 111, 140, 147, 148, 185, 196, 197, 210, 222, 245, 259, 294, 370, 394, 420, 444, 490, 518, 555, 588, 591, 735, 740, 777, 788, 980, 985, 1036, 1110, 1182, 1295, 1379, 1470, 1554, 1813, 1970, 2220, 2364, 2590, 2758, 2940, 2955, 3108, 3626, 3885, 3940, 4137, 5180, 5439, 5516, 5910, 6895, 7252, 7289, 7770, 8274, 9065, 9653, 10878, 11820, 13790, 14578, 15540, 16548, 18130, 19306, 20685, 21756, 21867, 27195, 27580, 28959, 29156, 36260, 36445, 38612, 41370, 43734, 48265, 51023, 54390, 57918, 72890, 82740, 87468, 96530, 102046, 108780, 109335, 115836, 144795, 145780, 153069, 193060, 204092, 218670, 255115, 289590, 306138, 357161, 437340, 510230, 579180, 612276, 714322, 765345, 1020460, 1071483, 1428644, 1530690, 1785805, 2142966, 3061380, 3571610, 4285932, 5357415, 7143220, 10714830, 21429660]

約数ペア:

[(1, 21429660), (2, 10714830), (3, 7143220), (4, 5357415), (5, 4285932), (6, 3571610), (7, 3061380), (10, 2142966), (12, 1785805), (14, 1530690), (15, 1428644), (20, 1071483), (21, 1020460), (28, 765345), (30, 714322), (35, 612276), (37, 579180), (42, 510230), (49, 437340), (60, 357161), (70, 306138), (74, 289590), (84, 255115), (98, 218670), (105, 204092), (111, 193060), (140, 153069), (147, 145780), (148, 144795), (185, 115836), (196, 109335), (197, 108780), (210, 102046), (222, 96530), (245, 87468), (259, 82740), (294, 72890), (370, 57918), (394, 54390), (420, 51023), (444, 48265), (490, 43734), (518, 41370), (555, 38612), (588, 36445), (591, 36260), (735, 29156), (740, 28959), (777, 27580), (788, 27195), (980, 21867), (985, 21756), (1036, 20685), (1110, 19306), (1182, 18130), (1295, 16548), (1379, 15540), (1470, 14578), (1554, 13790), (1813, 11820), (1970, 10878), (2220, 9653), (2364, 9065), (2590, 8274), (2758, 7770), (2940, 7289), (2955, 7252), (3108, 6895), (3626, 5910), (3885, 5516), (3940, 5439), (4137, 5180)]