20641695

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{67}}^1$

素因数の和:164

約数の個数: 64

約数和(自身を含む): 37601280

約数和(自身を除く): 16959585

約数列:

[1, 3, 5, 15, 19, 23, 47, 57, 67, 69, 95, 115, 141, 201, 235, 285, 335, 345, 437, 705, 893, 1005, 1081, 1273, 1311, 1541, 2185, 2679, 3149, 3243, 3819, 4465, 4623, 5405, 6365, 6555, 7705, 9447, 13395, 15745, 16215, 19095, 20539, 23115, 29279, 47235, 59831, 61617, 72427, 87837, 102695, 146395, 179493, 217281, 299155, 308085, 362135, 439185, 897465, 1086405, 1376113, 4128339, 6880565, 20641695]

約数ペア:

[(1, 20641695), (3, 6880565), (5, 4128339), (15, 1376113), (19, 1086405), (23, 897465), (47, 439185), (57, 362135), (67, 308085), (69, 299155), (95, 217281), (115, 179493), (141, 146395), (201, 102695), (235, 87837), (285, 72427), (335, 61617), (345, 59831), (437, 47235), (705, 29279), (893, 23115), (1005, 20539), (1081, 19095), (1273, 16215), (1311, 15745), (1541, 13395), (2185, 9447), (2679, 7705), (3149, 6555), (3243, 6365), (3819, 5405), (4465, 4623)]