20411640

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{31}}^2\times {\mathrm{59}}^1$

素因数の和:138

約数の個数: 144

約数和(自身を含む): 69708600

約数和(自身を除く): 49296960

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 31, 36, 40, 45, 59, 60, 62, 72, 90, 93, 118, 120, 124, 155, 177, 180, 186, 236, 248, 279, 295, 310, 354, 360, 372, 465, 472, 531, 558, 590, 620, 708, 744, 885, 930, 961, 1062, 1116, 1180, 1240, 1395, 1416, 1770, 1829, 1860, 1922, 2124, 2232, 2360, 2655, 2790, 2883, 3540, 3658, 3720, 3844, 4248, 4805, 5310, 5487, 5580, 5766, 7080, 7316, 7688, 8649, 9145, 9610, 10620, 10974, 11160, 11532, 14415, 14632, 16461, 17298, 18290, 19220, 21240, 21948, 23064, 27435, 28830, 32922, 34596, 36580, 38440, 43245, 43896, 54870, 56699, 57660, 65844, 69192, 73160, 82305, 86490, 109740, 113398, 115320, 131688, 164610, 170097, 172980, 219480, 226796, 283495, 329220, 340194, 345960, 453592, 510291, 566990, 658440, 680388, 850485, 1020582, 1133980, 1360776, 1700970, 2041164, 2267960, 2551455, 3401940, 4082328, 5102910, 6803880, 10205820, 20411640]

約数ペア:

[(1, 20411640), (2, 10205820), (3, 6803880), (4, 5102910), (5, 4082328), (6, 3401940), (8, 2551455), (9, 2267960), (10, 2041164), (12, 1700970), (15, 1360776), (18, 1133980), (20, 1020582), (24, 850485), (30, 680388), (31, 658440), (36, 566990), (40, 510291), (45, 453592), (59, 345960), (60, 340194), (62, 329220), (72, 283495), (90, 226796), (93, 219480), (118, 172980), (120, 170097), (124, 164610), (155, 131688), (177, 115320), (180, 113398), (186, 109740), (236, 86490), (248, 82305), (279, 73160), (295, 69192), (310, 65844), (354, 57660), (360, 56699), (372, 54870), (465, 43896), (472, 43245), (531, 38440), (558, 36580), (590, 34596), (620, 32922), (708, 28830), (744, 27435), (885, 23064), (930, 21948), (961, 21240), (1062, 19220), (1116, 18290), (1180, 17298), (1240, 16461), (1395, 14632), (1416, 14415), (1770, 11532), (1829, 11160), (1860, 10974), (1922, 10620), (2124, 9610), (2232, 9145), (2360, 8649), (2655, 7688), (2790, 7316), (2883, 7080), (3540, 5766), (3658, 5580), (3720, 5487), (3844, 5310), (4248, 4805)]