20492780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{1901}}^1$

素因数の和:1935

約数の個数: 72

約数和(自身を含む): 54640656

約数和(自身を除く): 34147876

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, 980, 1078, 1540, 1901, 2156, 2695, 3802, 5390, 7604, 9505, 10780, 13307, 19010, 20911, 26614, 38020, 41822, 53228, 66535, 83644, 93149, 104555, 133070, 146377, 186298, 209110, 266140, 292754, 372596, 418220, 465745, 585508, 731885, 931490, 1024639, 1463770, 1862980, 2049278, 2927540, 4098556, 5123195, 10246390, 20492780]

約数ペア:

[(1, 20492780), (2, 10246390), (4, 5123195), (5, 4098556), (7, 2927540), (10, 2049278), (11, 1862980), (14, 1463770), (20, 1024639), (22, 931490), (28, 731885), (35, 585508), (44, 465745), (49, 418220), (55, 372596), (70, 292754), (77, 266140), (98, 209110), (110, 186298), (140, 146377), (154, 133070), (196, 104555), (220, 93149), (245, 83644), (308, 66535), (385, 53228), (490, 41822), (539, 38020), (770, 26614), (980, 20911), (1078, 19010), (1540, 13307), (1901, 10780), (2156, 9505), (2695, 7604), (3802, 5390)]