8721020

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{809}}^1$

素因数の和:843

約数の個数: 72

約数和(自身を含む): 23269680

約数和(自身を除く): 14548660

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 49, 55, 70, 77, 98, 110, 140, 154, 196, 220, 245, 308, 385, 490, 539, 770, 809, 980, 1078, 1540, 1618, 2156, 2695, 3236, 4045, 5390, 5663, 8090, 8899, 10780, 11326, 16180, 17798, 22652, 28315, 35596, 39641, 44495, 56630, 62293, 79282, 88990, 113260, 124586, 158564, 177980, 198205, 249172, 311465, 396410, 436051, 622930, 792820, 872102, 1245860, 1744204, 2180255, 4360510, 8721020]

約数ペア:

[(1, 8721020), (2, 4360510), (4, 2180255), (5, 1744204), (7, 1245860), (10, 872102), (11, 792820), (14, 622930), (20, 436051), (22, 396410), (28, 311465), (35, 249172), (44, 198205), (49, 177980), (55, 158564), (70, 124586), (77, 113260), (98, 88990), (110, 79282), (140, 62293), (154, 56630), (196, 44495), (220, 39641), (245, 35596), (308, 28315), (385, 22652), (490, 17798), (539, 16180), (770, 11326), (809, 10780), (980, 8899), (1078, 8090), (1540, 5663), (1618, 5390), (2156, 4045), (2695, 3236)]