21263589

素因数分解:

$3^2\times {\mathrm{67}}^1\times {\mathrm{179}}^1\times {\mathrm{197}}^1$

素因数の和:449

約数の個数: 24

約数和(自身を含む): 31505760

約数和(自身を除く): 10242171

約数列:

[1, 3, 9, 67, 179, 197, 201, 537, 591, 603, 1611, 1773, 11993, 13199, 35263, 35979, 39597, 105789, 107937, 118791, 317367, 2362621, 7087863, 21263589]

約数ペア:

[(1, 21263589), (3, 7087863), (9, 2362621), (67, 317367), (179, 118791), (197, 107937), (201, 105789), (537, 39597), (591, 35979), (603, 35263), (1611, 13199), (1773, 11993)]