21920283

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{673}}^1$

素因数の和:744

約数の個数: 48

約数和(自身を含む): 40375296

約数和(自身を除く): 18455013

約数列:

[1, 3, 7, 9, 11, 21, 33, 47, 63, 77, 99, 141, 231, 329, 423, 517, 673, 693, 987, 1551, 2019, 2961, 3619, 4653, 4711, 6057, 7403, 10857, 14133, 22209, 31631, 32571, 42399, 51821, 66627, 94893, 155463, 221417, 284679, 347941, 466389, 664251, 1043823, 1992753, 2435587, 3131469, 7306761, 21920283]

約数ペア:

[(1, 21920283), (3, 7306761), (7, 3131469), (9, 2435587), (11, 1992753), (21, 1043823), (33, 664251), (47, 466389), (63, 347941), (77, 284679), (99, 221417), (141, 155463), (231, 94893), (329, 66627), (423, 51821), (517, 42399), (673, 32571), (693, 31631), (987, 22209), (1551, 14133), (2019, 10857), (2961, 7403), (3619, 6057), (4653, 4711)]