21321310

素因数分解:

$2^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{137}}^1\times {\mathrm{197}}^1$

素因数の和:420

約数の個数: 32

約数和(自身を含む): 39346560

約数和(自身を除く): 18025250

約数列:

[1, 2, 5, 10, 79, 137, 158, 197, 274, 394, 395, 685, 790, 985, 1370, 1970, 10823, 15563, 21646, 26989, 31126, 53978, 54115, 77815, 108230, 134945, 155630, 269890, 2132131, 4264262, 10660655, 21321310]

約数ペア:

[(1, 21321310), (2, 10660655), (5, 4264262), (10, 2132131), (79, 269890), (137, 155630), (158, 134945), (197, 108230), (274, 77815), (394, 54115), (395, 53978), (685, 31126), (790, 26989), (985, 21646), (1370, 15563), (1970, 10823)]