20807928

素因数分解:

$2^3\times 3^4\times {\mathrm{163}}^1\times {\mathrm{197}}^1$

素因数の和:378

約数の個数: 80

約数和(自身を含む): 58936680

約数和(自身を除く): 38128752

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 36, 54, 72, 81, 108, 162, 163, 197, 216, 324, 326, 394, 489, 591, 648, 652, 788, 978, 1182, 1304, 1467, 1576, 1773, 1956, 2364, 2934, 3546, 3912, 4401, 4728, 5319, 5868, 7092, 8802, 10638, 11736, 13203, 14184, 15957, 17604, 21276, 26406, 31914, 32111, 35208, 42552, 52812, 63828, 64222, 96333, 105624, 127656, 128444, 192666, 256888, 288999, 385332, 577998, 770664, 866997, 1155996, 1733994, 2311992, 2600991, 3467988, 5201982, 6935976, 10403964, 20807928]

約数ペア:

[(1, 20807928), (2, 10403964), (3, 6935976), (4, 5201982), (6, 3467988), (8, 2600991), (9, 2311992), (12, 1733994), (18, 1155996), (24, 866997), (27, 770664), (36, 577998), (54, 385332), (72, 288999), (81, 256888), (108, 192666), (162, 128444), (163, 127656), (197, 105624), (216, 96333), (324, 64222), (326, 63828), (394, 52812), (489, 42552), (591, 35208), (648, 32111), (652, 31914), (788, 26406), (978, 21276), (1182, 17604), (1304, 15957), (1467, 14184), (1576, 13203), (1773, 11736), (1956, 10638), (2364, 8802), (2934, 7092), (3546, 5868), (3912, 5319), (4401, 4728)]