20667915

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{1051}}^1$

素因数の和:1104

約数の個数: 48

約数和(自身を含む): 39386880

約数和(自身を除く): 18718965

約数列:

[1, 3, 5, 9, 15, 19, 23, 45, 57, 69, 95, 115, 171, 207, 285, 345, 437, 855, 1035, 1051, 1311, 2185, 3153, 3933, 5255, 6555, 9459, 15765, 19665, 19969, 24173, 47295, 59907, 72519, 99845, 120865, 179721, 217557, 299535, 362595, 459287, 898605, 1087785, 1377861, 2296435, 4133583, 6889305, 20667915]

約数ペア:

[(1, 20667915), (3, 6889305), (5, 4133583), (9, 2296435), (15, 1377861), (19, 1087785), (23, 898605), (45, 459287), (57, 362595), (69, 299535), (95, 217557), (115, 179721), (171, 120865), (207, 99845), (285, 72519), (345, 59907), (437, 47295), (855, 24173), (1035, 19969), (1051, 19665), (1311, 15765), (2185, 9459), (3153, 6555), (3933, 5255)]