21751353

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{137}}^1$

素因数の和:238

約数の個数: 48

約数和(自身を含む): 36167040

約数和(自身を除く): 14415687

約数列:

[1, 3, 9, 13, 23, 39, 59, 69, 117, 137, 177, 207, 299, 411, 531, 767, 897, 1233, 1357, 1781, 2301, 2691, 3151, 4071, 5343, 6903, 8083, 9453, 12213, 16029, 17641, 24249, 28359, 40963, 52923, 72747, 105079, 122889, 158769, 185909, 315237, 368667, 557727, 945711, 1673181, 2416817, 7250451, 21751353]

約数ペア:

[(1, 21751353), (3, 7250451), (9, 2416817), (13, 1673181), (23, 945711), (39, 557727), (59, 368667), (69, 315237), (117, 185909), (137, 158769), (177, 122889), (207, 105079), (299, 72747), (411, 52923), (531, 40963), (767, 28359), (897, 24249), (1233, 17641), (1357, 16029), (1781, 12213), (2301, 9453), (2691, 8083), (3151, 6903), (4071, 5343)]