21807928

素因数分解:

$2^3\times {\mathrm{97}}^1\times {\mathrm{157}}^1\times {\mathrm{179}}^1$

素因数の和:439

約数の個数: 32

約数和(自身を含む): 41806800

約数和(自身を除く): 19998872

約数列:

[1, 2, 4, 8, 97, 157, 179, 194, 314, 358, 388, 628, 716, 776, 1256, 1432, 15229, 17363, 28103, 30458, 34726, 56206, 60916, 69452, 112412, 121832, 138904, 224824, 2725991, 5451982, 10903964, 21807928]

約数ペア:

[(1, 21807928), (2, 10903964), (4, 5451982), (8, 2725991), (97, 224824), (157, 138904), (179, 121832), (194, 112412), (314, 69452), (358, 60916), (388, 56206), (628, 34726), (716, 30458), (776, 28103), (1256, 17363), (1432, 15229)]