21576243

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1\times {\mathrm{149}}^1$

素因数の和:291

約数の個数: 32

約数和(自身を含む): 32256000

約数和(自身を除く): 10679757

約数列:

[1, 3, 13, 39, 47, 79, 141, 149, 237, 447, 611, 1027, 1833, 1937, 3081, 3713, 5811, 7003, 11139, 11771, 21009, 35313, 48269, 91039, 144807, 153023, 273117, 459069, 553237, 1659711, 7192081, 21576243]

約数ペア:

[(1, 21576243), (3, 7192081), (13, 1659711), (39, 553237), (47, 459069), (79, 273117), (141, 153023), (149, 144807), (237, 91039), (447, 48269), (611, 35313), (1027, 21009), (1833, 11771), (1937, 11139), (3081, 7003), (3713, 5811)]