20992510

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{199}}^1$

素因数の和:361

約数の個数: 64

約数和(自身を含む): 47692800

約数和(自身を除く): 26700290

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 35, 55, 70, 77, 110, 137, 154, 199, 274, 385, 398, 685, 770, 959, 995, 1370, 1393, 1507, 1918, 1990, 2189, 2786, 3014, 4378, 4795, 6965, 7535, 9590, 10549, 10945, 13930, 15070, 15323, 21098, 21890, 27263, 30646, 52745, 54526, 76615, 105490, 136315, 153230, 190841, 272630, 299893, 381682, 599786, 954205, 1499465, 1908410, 2099251, 2998930, 4198502, 10496255, 20992510]

約数ペア:

[(1, 20992510), (2, 10496255), (5, 4198502), (7, 2998930), (10, 2099251), (11, 1908410), (14, 1499465), (22, 954205), (35, 599786), (55, 381682), (70, 299893), (77, 272630), (110, 190841), (137, 153230), (154, 136315), (199, 105490), (274, 76615), (385, 54526), (398, 52745), (685, 30646), (770, 27263), (959, 21890), (995, 21098), (1370, 15323), (1393, 15070), (1507, 13930), (1918, 10945), (1990, 10549), (2189, 9590), (2786, 7535), (3014, 6965), (4378, 4795)]