20986203

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{353}}^1$

素因数の和:531

約数の個数: 32

約数和(自身を含む): 33984000

約数和(自身を除く): 12997797

約数列:

[1, 3, 7, 19, 21, 57, 133, 149, 353, 399, 447, 1043, 1059, 2471, 2831, 3129, 6707, 7413, 8493, 19817, 20121, 46949, 52597, 59451, 140847, 157791, 368179, 999343, 1104537, 2998029, 6995401, 20986203]

約数ペア:

[(1, 20986203), (3, 6995401), (7, 2998029), (19, 1104537), (21, 999343), (57, 368179), (133, 157791), (149, 140847), (353, 59451), (399, 52597), (447, 46949), (1043, 20121), (1059, 19817), (2471, 8493), (2831, 7413), (3129, 6707)]