21258560

素因数分解:

$2^6\times 5^1\times {\mathrm{31}}^1\times {\mathrm{2143}}^1$

素因数の和:2191

約数の個数: 56

約数和(自身を含む): 52279296

約数和(自身を除く): 31020736

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 155, 160, 248, 310, 320, 496, 620, 992, 1240, 1984, 2143, 2480, 4286, 4960, 8572, 9920, 10715, 17144, 21430, 34288, 42860, 66433, 68576, 85720, 132866, 137152, 171440, 265732, 332165, 342880, 531464, 664330, 685760, 1062928, 1328660, 2125856, 2657320, 4251712, 5314640, 10629280, 21258560]

約数ペア:

[(1, 21258560), (2, 10629280), (4, 5314640), (5, 4251712), (8, 2657320), (10, 2125856), (16, 1328660), (20, 1062928), (31, 685760), (32, 664330), (40, 531464), (62, 342880), (64, 332165), (80, 265732), (124, 171440), (155, 137152), (160, 132866), (248, 85720), (310, 68576), (320, 66433), (496, 42860), (620, 34288), (992, 21430), (1240, 17144), (1984, 10715), (2143, 9920), (2480, 8572), (4286, 4960)]