21389193

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{107}}^1\times {\mathrm{167}}^1$

素因数の和:306

約数の個数: 48

約数和(自身を含む): 37739520

約数和(自身を除く): 16350327

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 107, 133, 167, 171, 321, 399, 501, 749, 963, 1169, 1197, 1503, 2033, 2247, 3173, 3507, 6099, 6741, 9519, 10521, 14231, 17869, 18297, 22211, 28557, 42693, 53607, 66633, 125083, 128079, 160821, 199899, 339511, 375249, 1018533, 1125747, 2376577, 3055599, 7129731, 21389193]

約数ペア:

[(1, 21389193), (3, 7129731), (7, 3055599), (9, 2376577), (19, 1125747), (21, 1018533), (57, 375249), (63, 339511), (107, 199899), (133, 160821), (167, 128079), (171, 125083), (321, 66633), (399, 53607), (501, 42693), (749, 28557), (963, 22211), (1169, 18297), (1197, 17869), (1503, 14231), (2033, 10521), (2247, 9519), (3173, 6741), (3507, 6099)]