20907684

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{163}}^1\times {\mathrm{509}}^1$

素因数の和:689

約数の個数: 72

約数和(自身を含む): 60889920

約数和(自身を除く): 39982236

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, 163, 252, 326, 489, 509, 652, 978, 1018, 1141, 1467, 1527, 1956, 2036, 2282, 2934, 3054, 3423, 3563, 4564, 4581, 5868, 6108, 6846, 7126, 9162, 10269, 10689, 13692, 14252, 18324, 20538, 21378, 32067, 41076, 42756, 64134, 82967, 128268, 165934, 248901, 331868, 497802, 580769, 746703, 995604, 1161538, 1493406, 1742307, 2323076, 2986812, 3484614, 5226921, 6969228, 10453842, 20907684]

約数ペア:

[(1, 20907684), (2, 10453842), (3, 6969228), (4, 5226921), (6, 3484614), (7, 2986812), (9, 2323076), (12, 1742307), (14, 1493406), (18, 1161538), (21, 995604), (28, 746703), (36, 580769), (42, 497802), (63, 331868), (84, 248901), (126, 165934), (163, 128268), (252, 82967), (326, 64134), (489, 42756), (509, 41076), (652, 32067), (978, 21378), (1018, 20538), (1141, 18324), (1467, 14252), (1527, 13692), (1956, 10689), (2036, 10269), (2282, 9162), (2934, 7126), (3054, 6846), (3423, 6108), (3563, 5868), (4564, 4581)]