21386505

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{353}}^1\times {\mathrm{577}}^1$

素因数の和:945

約数の個数: 32

約数和(自身を含む): 39285504

約数和(自身を除く): 17898999

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 353, 577, 1059, 1731, 1765, 2471, 2885, 4039, 5295, 7413, 8655, 12117, 12355, 20195, 37065, 60585, 203681, 611043, 1018405, 1425767, 3055215, 4277301, 7128835, 21386505]

約数ペア:

[(1, 21386505), (3, 7128835), (5, 4277301), (7, 3055215), (15, 1425767), (21, 1018405), (35, 611043), (105, 203681), (353, 60585), (577, 37065), (1059, 20195), (1731, 12355), (1765, 12117), (2471, 8655), (2885, 7413), (4039, 5295)]