21040695

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{631}}^1$

素因数の和:677

約数の個数: 64

約数和(自身を含む): 42470400

約数和(自身を除く): 21429705

約数列:

[1, 3, 5, 9, 13, 15, 19, 27, 39, 45, 57, 65, 95, 117, 135, 171, 195, 247, 285, 351, 513, 585, 631, 741, 855, 1235, 1755, 1893, 2223, 2565, 3155, 3705, 5679, 6669, 8203, 9465, 11115, 11989, 17037, 24609, 28395, 33345, 35967, 41015, 59945, 73827, 85185, 107901, 123045, 155857, 179835, 221481, 323703, 369135, 467571, 539505, 779285, 1107405, 1402713, 1618515, 2337855, 4208139, 7013565, 21040695]

約数ペア:

[(1, 21040695), (3, 7013565), (5, 4208139), (9, 2337855), (13, 1618515), (15, 1402713), (19, 1107405), (27, 779285), (39, 539505), (45, 467571), (57, 369135), (65, 323703), (95, 221481), (117, 179835), (135, 155857), (171, 123045), (195, 107901), (247, 85185), (285, 73827), (351, 59945), (513, 41015), (585, 35967), (631, 33345), (741, 28395), (855, 24609), (1235, 17037), (1755, 11989), (1893, 11115), (2223, 9465), (2565, 8203), (3155, 6669), (3705, 5679)]