21508905

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{2137}}^1$

素因数の和:2217

約数の個数: 32

約数和(自身を含む): 38176128

約数和(自身を除く): 16667223

約数列:

[1, 3, 5, 11, 15, 33, 55, 61, 165, 183, 305, 671, 915, 2013, 2137, 3355, 6411, 10065, 10685, 23507, 32055, 70521, 117535, 130357, 352605, 391071, 651785, 1433927, 1955355, 4301781, 7169635, 21508905]

約数ペア:

[(1, 21508905), (3, 7169635), (5, 4301781), (11, 1955355), (15, 1433927), (33, 651785), (55, 391071), (61, 352605), (165, 130357), (183, 117535), (305, 70521), (671, 32055), (915, 23507), (2013, 10685), (2137, 10065), (3355, 6411)]