21163443

素因数分解:

$3^1\times 7^3\times {\mathrm{131}}^1\times {\mathrm{157}}^1$

素因数の和:312

約数の個数: 32

約数和(自身を含む): 33369600

約数和(自身を除く): 12206157

約数列:

[1, 3, 7, 21, 49, 131, 147, 157, 343, 393, 471, 917, 1029, 1099, 2751, 3297, 6419, 7693, 19257, 20567, 23079, 44933, 53851, 61701, 134799, 143969, 161553, 431907, 1007783, 3023349, 7054481, 21163443]

約数ペア:

[(1, 21163443), (3, 7054481), (7, 3023349), (21, 1007783), (49, 431907), (131, 161553), (147, 143969), (157, 134799), (343, 61701), (393, 53851), (471, 44933), (917, 23079), (1029, 20567), (1099, 19257), (2751, 7693), (3297, 6419)]