21534939

素因数分解:

$3^2\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{503}}^1$

素因数の和:647

約数の個数: 24

約数和(自身を含む): 32078592

約数和(自身を除く): 10543653

約数列:

[1, 3, 9, 67, 71, 201, 213, 503, 603, 639, 1509, 4527, 4757, 14271, 33701, 35713, 42813, 101103, 107139, 303309, 321417, 2392771, 7178313, 21534939]

約数ペア:

[(1, 21534939), (3, 7178313), (9, 2392771), (67, 321417), (71, 303309), (201, 107139), (213, 101103), (503, 42813), (603, 35713), (639, 33701), (1509, 14271), (4527, 4757)]