21491145

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2161}}^1$

素因数の和:2202

約数の個数: 48

約数和(自身を含む): 42496272

約数和(自身を除く): 21005127

約数列:

[1, 3, 5, 9, 13, 15, 17, 39, 45, 51, 65, 85, 117, 153, 195, 221, 255, 585, 663, 765, 1105, 1989, 2161, 3315, 6483, 9945, 10805, 19449, 28093, 32415, 36737, 84279, 97245, 110211, 140465, 183685, 252837, 330633, 421395, 477581, 551055, 1264185, 1432743, 1653165, 2387905, 4298229, 7163715, 21491145]

約数ペア:

[(1, 21491145), (3, 7163715), (5, 4298229), (9, 2387905), (13, 1653165), (15, 1432743), (17, 1264185), (39, 551055), (45, 477581), (51, 421395), (65, 330633), (85, 252837), (117, 183685), (153, 140465), (195, 110211), (221, 97245), (255, 84279), (585, 36737), (663, 32415), (765, 28093), (1105, 19449), (1989, 10805), (2161, 9945), (3315, 6483)]