21985755

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{7013}}^1$

素因数の和:7051

約数の個数: 32

約数和(自身を含む): 40400640

約数和(自身を除く): 18414885

約数列:

[1, 3, 5, 11, 15, 19, 33, 55, 57, 95, 165, 209, 285, 627, 1045, 3135, 7013, 21039, 35065, 77143, 105195, 133247, 231429, 385715, 399741, 666235, 1157145, 1465717, 1998705, 4397151, 7328585, 21985755]

約数ペア:

[(1, 21985755), (3, 7328585), (5, 4397151), (11, 1998705), (15, 1465717), (19, 1157145), (33, 666235), (55, 399741), (57, 385715), (95, 231429), (165, 133247), (209, 105195), (285, 77143), (627, 35065), (1045, 21039), (3135, 7013)]