21259537

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{83}}^1$

素因数の和:193

約数の個数: 32

約数和(自身を含む): 26248320

約数和(自身を除く): 4988783

約数列:

[1, 13, 17, 19, 61, 83, 221, 247, 323, 793, 1037, 1079, 1159, 1411, 1577, 4199, 5063, 13481, 15067, 18343, 19703, 20501, 26809, 65819, 86071, 96197, 256139, 348517, 1118923, 1250561, 1635349, 21259537]

約数ペア:

[(1, 21259537), (13, 1635349), (17, 1250561), (19, 1118923), (61, 348517), (83, 256139), (221, 96197), (247, 86071), (323, 65819), (793, 26809), (1037, 20501), (1079, 19703), (1159, 18343), (1411, 15067), (1577, 13481), (4199, 5063)]