21131715

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{1439}}^1$

素因数の和:1547

約数の個数: 32

約数和(自身を含む): 37324800

約数和(自身を除く): 16193085

約数列:

[1, 3, 5, 11, 15, 33, 55, 89, 165, 267, 445, 979, 1335, 1439, 2937, 4317, 4895, 7195, 14685, 15829, 21585, 47487, 79145, 128071, 237435, 384213, 640355, 1408781, 1921065, 4226343, 7043905, 21131715]

約数ペア:

[(1, 21131715), (3, 7043905), (5, 4226343), (11, 1921065), (15, 1408781), (33, 640355), (55, 384213), (89, 237435), (165, 128071), (267, 79145), (445, 47487), (979, 21585), (1335, 15829), (1439, 14685), (2937, 7195), (4317, 4895)]