21574760

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{137}}^1$

素因数の和:306

約数の個数: 64

約数和(自身を含む): 50872320

約数和(自身を除く): 29297560

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 127, 137, 155, 248, 254, 274, 310, 508, 548, 620, 635, 685, 1016, 1096, 1240, 1270, 1370, 2540, 2740, 3937, 4247, 5080, 5480, 7874, 8494, 15748, 16988, 17399, 19685, 21235, 31496, 33976, 34798, 39370, 42470, 69596, 78740, 84940, 86995, 139192, 157480, 169880, 173990, 347980, 539369, 695960, 1078738, 2157476, 2696845, 4314952, 5393690, 10787380, 21574760]

約数ペア:

[(1, 21574760), (2, 10787380), (4, 5393690), (5, 4314952), (8, 2696845), (10, 2157476), (20, 1078738), (31, 695960), (40, 539369), (62, 347980), (124, 173990), (127, 169880), (137, 157480), (155, 139192), (248, 86995), (254, 84940), (274, 78740), (310, 69596), (508, 42470), (548, 39370), (620, 34798), (635, 33976), (685, 31496), (1016, 21235), (1096, 19685), (1240, 17399), (1270, 16988), (1370, 15748), (2540, 8494), (2740, 7874), (3937, 5480), (4247, 5080)]