21331431

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{269}}^1$

素因数の和:381

約数の個数: 40

約数和(自身を含む): 35283600

約数和(自身を除く): 13952169

約数列:

[1, 3, 9, 11, 27, 33, 81, 89, 99, 267, 269, 297, 801, 807, 891, 979, 2403, 2421, 2937, 2959, 7209, 7263, 8811, 8877, 21789, 23941, 26433, 26631, 71823, 79299, 79893, 215469, 239679, 263351, 646407, 790053, 1939221, 2370159, 7110477, 21331431]

約数ペア:

[(1, 21331431), (3, 7110477), (9, 2370159), (11, 1939221), (27, 790053), (33, 646407), (81, 263351), (89, 239679), (99, 215469), (267, 79893), (269, 79299), (297, 71823), (801, 26631), (807, 26433), (891, 23941), (979, 21789), (2403, 8877), (2421, 8811), (2937, 7263), (2959, 7209)]