19982950

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{433}}^1$

素因数の和:529

約数の個数: 48

約数和(自身を含む): 40684896

約数和(自身を除く): 20701946

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 71, 130, 142, 325, 355, 433, 650, 710, 866, 923, 1775, 1846, 2165, 3550, 4330, 4615, 5629, 9230, 10825, 11258, 21650, 23075, 28145, 30743, 46150, 56290, 61486, 140725, 153715, 281450, 307430, 399659, 768575, 799318, 1537150, 1998295, 3996590, 9991475, 19982950]

約数ペア:

[(1, 19982950), (2, 9991475), (5, 3996590), (10, 1998295), (13, 1537150), (25, 799318), (26, 768575), (50, 399659), (65, 307430), (71, 281450), (130, 153715), (142, 140725), (325, 61486), (355, 56290), (433, 46150), (650, 30743), (710, 28145), (866, 23075), (923, 21650), (1775, 11258), (1846, 10825), (2165, 9230), (3550, 5629), (4330, 4615)]