21538758

素因数分解:

$2^1\times 3^1\times {\mathrm{67}}^1\times {\mathrm{131}}^1\times {\mathrm{409}}^1$

素因数の和:612

約数の個数: 32

約数和(自身を含む): 44161920

約数和(自身を除く): 22623162

約数列:

[1, 2, 3, 6, 67, 131, 134, 201, 262, 393, 402, 409, 786, 818, 1227, 2454, 8777, 17554, 26331, 27403, 52662, 53579, 54806, 82209, 107158, 160737, 164418, 321474, 3589793, 7179586, 10769379, 21538758]

約数ペア:

[(1, 21538758), (2, 10769379), (3, 7179586), (6, 3589793), (67, 321474), (131, 164418), (134, 160737), (201, 107158), (262, 82209), (393, 54806), (402, 53579), (409, 52662), (786, 27403), (818, 26331), (1227, 17554), (2454, 8777)]