21239680

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{431}}^1$

素因数の和:468

約数の個数: 128

約数和(自身を含む): 63452160

約数和(自身を除く): 42212480

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 32, 35, 40, 44, 55, 56, 64, 70, 77, 80, 88, 110, 112, 128, 140, 154, 160, 176, 220, 224, 280, 308, 320, 352, 385, 431, 440, 448, 560, 616, 640, 704, 770, 862, 880, 896, 1120, 1232, 1408, 1540, 1724, 1760, 2155, 2240, 2464, 3017, 3080, 3448, 3520, 4310, 4480, 4741, 4928, 6034, 6160, 6896, 7040, 8620, 9482, 9856, 12068, 12320, 13792, 15085, 17240, 18964, 23705, 24136, 24640, 27584, 30170, 33187, 34480, 37928, 47410, 48272, 49280, 55168, 60340, 66374, 68960, 75856, 94820, 96544, 120680, 132748, 137920, 151712, 165935, 189640, 193088, 241360, 265496, 275840, 303424, 331870, 379280, 386176, 482720, 530992, 606848, 663740, 758560, 965440, 1061984, 1327480, 1517120, 1930880, 2123968, 2654960, 3034240, 4247936, 5309920, 10619840, 21239680]

約数ペア:

[(1, 21239680), (2, 10619840), (4, 5309920), (5, 4247936), (7, 3034240), (8, 2654960), (10, 2123968), (11, 1930880), (14, 1517120), (16, 1327480), (20, 1061984), (22, 965440), (28, 758560), (32, 663740), (35, 606848), (40, 530992), (44, 482720), (55, 386176), (56, 379280), (64, 331870), (70, 303424), (77, 275840), (80, 265496), (88, 241360), (110, 193088), (112, 189640), (128, 165935), (140, 151712), (154, 137920), (160, 132748), (176, 120680), (220, 96544), (224, 94820), (280, 75856), (308, 68960), (320, 66374), (352, 60340), (385, 55168), (431, 49280), (440, 48272), (448, 47410), (560, 37928), (616, 34480), (640, 33187), (704, 30170), (770, 27584), (862, 24640), (880, 24136), (896, 23705), (1120, 18964), (1232, 17240), (1408, 15085), (1540, 13792), (1724, 12320), (1760, 12068), (2155, 9856), (2240, 9482), (2464, 8620), (3017, 7040), (3080, 6896), (3448, 6160), (3520, 6034), (4310, 4928), (4480, 4741)]