19901163

素因数分解:

$3^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{157}}^1$

素因数の和:267

約数の個数: 32

約数和(自身を含む): 29122560

約数和(自身を除く): 9221397

約数列:

[1, 3, 29, 31, 47, 87, 93, 141, 157, 471, 899, 1363, 1457, 2697, 4089, 4371, 4553, 4867, 7379, 13659, 14601, 22137, 42253, 126759, 141143, 213991, 228749, 423429, 641973, 686247, 6633721, 19901163]

約数ペア:

[(1, 19901163), (3, 6633721), (29, 686247), (31, 641973), (47, 423429), (87, 228749), (93, 213991), (141, 141143), (157, 126759), (471, 42253), (899, 22137), (1363, 14601), (1457, 13659), (2697, 7379), (4089, 4867), (4371, 4553)]