20818665

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1$

素因数の和:143

約数の個数: 96

約数和(自身を含む): 44478720

約数和(自身を除く): 23660055

約数列:

[1, 3, 5, 7, 9, 15, 21, 29, 35, 43, 45, 53, 63, 87, 105, 129, 145, 159, 203, 215, 261, 265, 301, 315, 371, 387, 435, 477, 609, 645, 795, 903, 1015, 1113, 1247, 1305, 1505, 1537, 1827, 1855, 1935, 2279, 2385, 2709, 3045, 3339, 3741, 4515, 4611, 5565, 6235, 6837, 7685, 8729, 9135, 10759, 11223, 11395, 13545, 13833, 15953, 16695, 18705, 20511, 23055, 26187, 32277, 34185, 43645, 47859, 53795, 56115, 66091, 69165, 78561, 79765, 96831, 102555, 130935, 143577, 161385, 198273, 239295, 330455, 392805, 462637, 484155, 594819, 717885, 991365, 1387911, 2313185, 2974095, 4163733, 6939555, 20818665]

約数ペア:

[(1, 20818665), (3, 6939555), (5, 4163733), (7, 2974095), (9, 2313185), (15, 1387911), (21, 991365), (29, 717885), (35, 594819), (43, 484155), (45, 462637), (53, 392805), (63, 330455), (87, 239295), (105, 198273), (129, 161385), (145, 143577), (159, 130935), (203, 102555), (215, 96831), (261, 79765), (265, 78561), (301, 69165), (315, 66091), (371, 56115), (387, 53795), (435, 47859), (477, 43645), (609, 34185), (645, 32277), (795, 26187), (903, 23055), (1015, 20511), (1113, 18705), (1247, 16695), (1305, 15953), (1505, 13833), (1537, 13545), (1827, 11395), (1855, 11223), (1935, 10759), (2279, 9135), (2385, 8729), (2709, 7685), (3045, 6837), (3339, 6235), (3741, 5565), (4515, 4611)]