221465480

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{331}}^1\times {\mathrm{389}}^1$

素因数の和:774

約数の個数: 64

約数和(自身を含む): 512740800

約数和(自身を除く): 291275320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 331, 344, 389, 430, 662, 778, 860, 1324, 1556, 1655, 1720, 1945, 2648, 3112, 3310, 3890, 6620, 7780, 13240, 14233, 15560, 16727, 28466, 33454, 56932, 66908, 71165, 83635, 113864, 128759, 133816, 142330, 167270, 257518, 284660, 334540, 515036, 569320, 643795, 669080, 1030072, 1287590, 2575180, 5150360, 5536637, 11073274, 22146548, 27683185, 44293096, 55366370, 110732740, 221465480]

約数ペア:

[(1, 221465480), (2, 110732740), (4, 55366370), (5, 44293096), (8, 27683185), (10, 22146548), (20, 11073274), (40, 5536637), (43, 5150360), (86, 2575180), (172, 1287590), (215, 1030072), (331, 669080), (344, 643795), (389, 569320), (430, 515036), (662, 334540), (778, 284660), (860, 257518), (1324, 167270), (1556, 142330), (1655, 133816), (1720, 128759), (1945, 113864), (2648, 83635), (3112, 71165), (3310, 66908), (3890, 56932), (6620, 33454), (7780, 28466), (13240, 16727), (14233, 15560)]