21456825

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{373}}^1$

素因数の和:458

約数の個数: 48

約数和(自身を含む): 38955840

約数和(自身を除く): 17499015

約数列:

[1, 3, 5, 13, 15, 25, 39, 59, 65, 75, 177, 195, 295, 325, 373, 767, 885, 975, 1119, 1475, 1865, 2301, 3835, 4425, 4849, 5595, 9325, 11505, 14547, 19175, 22007, 24245, 27975, 57525, 66021, 72735, 110035, 121225, 286091, 330105, 363675, 550175, 858273, 1430455, 1650525, 4291365, 7152275, 21456825]

約数ペア:

[(1, 21456825), (3, 7152275), (5, 4291365), (13, 1650525), (15, 1430455), (25, 858273), (39, 550175), (59, 363675), (65, 330105), (75, 286091), (177, 121225), (195, 110035), (295, 72735), (325, 66021), (373, 57525), (767, 27975), (885, 24245), (975, 22007), (1119, 19175), (1475, 14547), (1865, 11505), (2301, 9325), (3835, 5595), (4425, 4849)]