21711885

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{103}}^1$

素因数の和:194

約数の個数: 64

約数和(自身を含む): 40255488

約数和(自身を除く): 18543603

約数列:

[1, 3, 5, 13, 15, 23, 39, 47, 65, 69, 103, 115, 141, 195, 235, 299, 309, 345, 515, 611, 705, 897, 1081, 1339, 1495, 1545, 1833, 2369, 3055, 3243, 4017, 4485, 4841, 5405, 6695, 7107, 9165, 11845, 14053, 14523, 16215, 20085, 24205, 30797, 35535, 42159, 62933, 70265, 72615, 92391, 111343, 153985, 188799, 210795, 314665, 334029, 461955, 556715, 943995, 1447459, 1670145, 4342377, 7237295, 21711885]

約数ペア:

[(1, 21711885), (3, 7237295), (5, 4342377), (13, 1670145), (15, 1447459), (23, 943995), (39, 556715), (47, 461955), (65, 334029), (69, 314665), (103, 210795), (115, 188799), (141, 153985), (195, 111343), (235, 92391), (299, 72615), (309, 70265), (345, 62933), (515, 42159), (611, 35535), (705, 30797), (897, 24205), (1081, 20085), (1339, 16215), (1495, 14523), (1545, 14053), (1833, 11845), (2369, 9165), (3055, 7107), (3243, 6695), (4017, 5405), (4485, 4841)]