21545223

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{83}}^1\times {\mathrm{263}}^1$

素因数の和:403

約数の個数: 32

約数和(自身を含む): 34062336

約数和(自身を除く): 12517113

約数列:

[1, 3, 7, 21, 47, 83, 141, 249, 263, 329, 581, 789, 987, 1743, 1841, 3901, 5523, 11703, 12361, 21829, 27307, 37083, 65487, 81921, 86527, 152803, 259581, 458409, 1025963, 3077889, 7181741, 21545223]

約数ペア:

[(1, 21545223), (3, 7181741), (7, 3077889), (21, 1025963), (47, 458409), (83, 259581), (141, 152803), (249, 86527), (263, 81921), (329, 65487), (581, 37083), (789, 27307), (987, 21829), (1743, 12361), (1841, 11703), (3901, 5523)]