21131595

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{1201}}^1$

素因数の和:1252

約数の個数: 48

約数和(自身を含む): 40502592

約数和(自身を除く): 19370997

約数列:

[1, 3, 5, 9, 15, 17, 23, 45, 51, 69, 85, 115, 153, 207, 255, 345, 391, 765, 1035, 1173, 1201, 1955, 3519, 3603, 5865, 6005, 10809, 17595, 18015, 20417, 27623, 54045, 61251, 82869, 102085, 138115, 183753, 248607, 306255, 414345, 469591, 918765, 1243035, 1408773, 2347955, 4226319, 7043865, 21131595]

約数ペア:

[(1, 21131595), (3, 7043865), (5, 4226319), (9, 2347955), (15, 1408773), (17, 1243035), (23, 918765), (45, 469591), (51, 414345), (69, 306255), (85, 248607), (115, 183753), (153, 138115), (207, 102085), (255, 82869), (345, 61251), (391, 54045), (765, 27623), (1035, 20417), (1173, 18015), (1201, 17595), (1955, 10809), (3519, 6005), (3603, 5865)]