21462980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^2\times {\mathrm{181}}^1$

素因数の和:226

約数の個数: 108

約数和(自身を含む): 57949164

約数和(自身を除く): 36486184

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 49, 55, 70, 77, 98, 110, 121, 140, 154, 181, 196, 220, 242, 245, 308, 362, 385, 484, 490, 539, 605, 724, 770, 847, 905, 980, 1078, 1210, 1267, 1540, 1694, 1810, 1991, 2156, 2420, 2534, 2695, 3388, 3620, 3982, 4235, 5068, 5390, 5929, 6335, 7964, 8470, 8869, 9955, 10780, 11858, 12670, 13937, 16940, 17738, 19910, 21901, 23716, 25340, 27874, 29645, 35476, 39820, 43802, 44345, 55748, 59290, 69685, 87604, 88690, 97559, 109505, 118580, 139370, 153307, 177380, 195118, 219010, 278740, 306614, 390236, 438020, 487795, 613228, 766535, 975590, 1073149, 1533070, 1951180, 2146298, 3066140, 4292596, 5365745, 10731490, 21462980]

約数ペア:

[(1, 21462980), (2, 10731490), (4, 5365745), (5, 4292596), (7, 3066140), (10, 2146298), (11, 1951180), (14, 1533070), (20, 1073149), (22, 975590), (28, 766535), (35, 613228), (44, 487795), (49, 438020), (55, 390236), (70, 306614), (77, 278740), (98, 219010), (110, 195118), (121, 177380), (140, 153307), (154, 139370), (181, 118580), (196, 109505), (220, 97559), (242, 88690), (245, 87604), (308, 69685), (362, 59290), (385, 55748), (484, 44345), (490, 43802), (539, 39820), (605, 35476), (724, 29645), (770, 27874), (847, 25340), (905, 23716), (980, 21901), (1078, 19910), (1210, 17738), (1267, 16940), (1540, 13937), (1694, 12670), (1810, 11858), (1991, 10780), (2156, 9955), (2420, 8869), (2534, 8470), (2695, 7964), (3388, 6335), (3620, 5929), (3982, 5390), (4235, 5068)]