21185655

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{251}}^1\times {\mathrm{331}}^1$

素因数の和:607

約数の個数: 32

約数和(自身を含む): 36142848

約数和(自身を除く): 14957193

約数列:

[1, 3, 5, 15, 17, 51, 85, 251, 255, 331, 753, 993, 1255, 1655, 3765, 4267, 4965, 5627, 12801, 16881, 21335, 28135, 64005, 83081, 84405, 249243, 415405, 1246215, 1412377, 4237131, 7061885, 21185655]

約数ペア:

[(1, 21185655), (3, 7061885), (5, 4237131), (15, 1412377), (17, 1246215), (51, 415405), (85, 249243), (251, 84405), (255, 83081), (331, 64005), (753, 28135), (993, 21335), (1255, 16881), (1655, 12801), (3765, 5627), (4267, 4965)]