21089367

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{461}}^1$

素因数の和:520

約数の個数: 48

約数和(自身を含む): 36324288

約数和(自身を除く): 15234921

約数列:

[1, 3, 9, 13, 17, 23, 39, 51, 69, 117, 153, 207, 221, 299, 391, 461, 663, 897, 1173, 1383, 1989, 2691, 3519, 4149, 5083, 5993, 7837, 10603, 15249, 17979, 23511, 31809, 45747, 53937, 70533, 95427, 101881, 137839, 180251, 305643, 413517, 540753, 916929, 1240551, 1622259, 2343263, 7029789, 21089367]

約数ペア:

[(1, 21089367), (3, 7029789), (9, 2343263), (13, 1622259), (17, 1240551), (23, 916929), (39, 540753), (51, 413517), (69, 305643), (117, 180251), (153, 137839), (207, 101881), (221, 95427), (299, 70533), (391, 53937), (461, 45747), (663, 31809), (897, 23511), (1173, 17979), (1383, 15249), (1989, 10603), (2691, 7837), (3519, 5993), (4149, 5083)]