20111720

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{107}}^1\times {\mathrm{127}}^1$

素因数の和:282

約数の個数: 64

約数和(自身を含む): 47278080

約数和(自身を除く): 27166360

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 107, 127, 148, 185, 214, 254, 296, 370, 428, 508, 535, 635, 740, 856, 1016, 1070, 1270, 1480, 2140, 2540, 3959, 4280, 4699, 5080, 7918, 9398, 13589, 15836, 18796, 19795, 23495, 27178, 31672, 37592, 39590, 46990, 54356, 67945, 79180, 93980, 108712, 135890, 158360, 187960, 271780, 502793, 543560, 1005586, 2011172, 2513965, 4022344, 5027930, 10055860, 20111720]

約数ペア:

[(1, 20111720), (2, 10055860), (4, 5027930), (5, 4022344), (8, 2513965), (10, 2011172), (20, 1005586), (37, 543560), (40, 502793), (74, 271780), (107, 187960), (127, 158360), (148, 135890), (185, 108712), (214, 93980), (254, 79180), (296, 67945), (370, 54356), (428, 46990), (508, 39590), (535, 37592), (635, 31672), (740, 27178), (856, 23495), (1016, 19795), (1070, 18796), (1270, 15836), (1480, 13589), (2140, 9398), (2540, 7918), (3959, 5080), (4280, 4699)]