21539280

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{12821}}^1$

素因数の和:12844

約数の個数: 80

約数和(自身を含む): 76316544

約数和(自身を除く): 54777264

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 120, 140, 168, 210, 240, 280, 336, 420, 560, 840, 1680, 12821, 25642, 38463, 51284, 64105, 76926, 89747, 102568, 128210, 153852, 179494, 192315, 205136, 256420, 269241, 307704, 358988, 384630, 448735, 512840, 538482, 615408, 717976, 769260, 897470, 1025680, 1076964, 1346205, 1435952, 1538520, 1794940, 2153928, 2692410, 3077040, 3589880, 4307856, 5384820, 7179760, 10769640, 21539280]

約数ペア:

[(1, 21539280), (2, 10769640), (3, 7179760), (4, 5384820), (5, 4307856), (6, 3589880), (7, 3077040), (8, 2692410), (10, 2153928), (12, 1794940), (14, 1538520), (15, 1435952), (16, 1346205), (20, 1076964), (21, 1025680), (24, 897470), (28, 769260), (30, 717976), (35, 615408), (40, 538482), (42, 512840), (48, 448735), (56, 384630), (60, 358988), (70, 307704), (80, 269241), (84, 256420), (105, 205136), (112, 192315), (120, 179494), (140, 153852), (168, 128210), (210, 102568), (240, 89747), (280, 76926), (336, 64105), (420, 51284), (560, 38463), (840, 25642), (1680, 12821)]