21120590

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{1249}}^1$

素因数の和:1364

約数の個数: 32

約数和(自身を含む): 40500000

約数和(自身を除く): 19379410

約数列:

[1, 2, 5, 10, 19, 38, 89, 95, 178, 190, 445, 890, 1249, 1691, 2498, 3382, 6245, 8455, 12490, 16910, 23731, 47462, 111161, 118655, 222322, 237310, 555805, 1111610, 2112059, 4224118, 10560295, 21120590]

約数ペア:

[(1, 21120590), (2, 10560295), (5, 4224118), (10, 2112059), (19, 1111610), (38, 555805), (89, 237310), (95, 222322), (178, 118655), (190, 111161), (445, 47462), (890, 23731), (1249, 16910), (1691, 12490), (2498, 8455), (3382, 6245)]