28021221

素因数分解:

$3^4\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{151}}^1$

素因数の和:271

約数の個数: 40

約数和(自身を含む): 44140800

約数和(自身を除く): 16119579

約数列:

[1, 3, 9, 27, 29, 79, 81, 87, 151, 237, 261, 453, 711, 783, 1359, 2133, 2291, 2349, 4077, 4379, 6399, 6873, 11929, 12231, 13137, 20619, 35787, 39411, 61857, 107361, 118233, 185571, 322083, 345941, 354699, 966249, 1037823, 3113469, 9340407, 28021221]

約数ペア:

[(1, 28021221), (3, 9340407), (9, 3113469), (27, 1037823), (29, 966249), (79, 354699), (81, 345941), (87, 322083), (151, 185571), (237, 118233), (261, 107361), (453, 61857), (711, 39411), (783, 35787), (1359, 20619), (2133, 13137), (2291, 12231), (2349, 11929), (4077, 6873), (4379, 6399)]