21253128

素因数分解:

$2^3\times 3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{4007}}^1$

素因数の和:4046

約数の個数: 64

約数和(自身を含む): 60600960

約数和(自身を除く): 39347832

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 17, 24, 26, 34, 39, 51, 52, 68, 78, 102, 104, 136, 156, 204, 221, 312, 408, 442, 663, 884, 1326, 1768, 2652, 4007, 5304, 8014, 12021, 16028, 24042, 32056, 48084, 52091, 68119, 96168, 104182, 136238, 156273, 204357, 208364, 272476, 312546, 408714, 416728, 544952, 625092, 817428, 885547, 1250184, 1634856, 1771094, 2656641, 3542188, 5313282, 7084376, 10626564, 21253128]

約数ペア:

[(1, 21253128), (2, 10626564), (3, 7084376), (4, 5313282), (6, 3542188), (8, 2656641), (12, 1771094), (13, 1634856), (17, 1250184), (24, 885547), (26, 817428), (34, 625092), (39, 544952), (51, 416728), (52, 408714), (68, 312546), (78, 272476), (102, 208364), (104, 204357), (136, 156273), (156, 136238), (204, 104182), (221, 96168), (312, 68119), (408, 52091), (442, 48084), (663, 32056), (884, 24042), (1326, 16028), (1768, 12021), (2652, 8014), (4007, 5304)]