81782820

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{1381}}^1$

素因数の和:1450

約数の個数: 144

約数和(自身を含む): 289755648

約数和(自身を除く): 207972828

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 47, 60, 63, 70, 84, 90, 94, 105, 126, 140, 141, 180, 188, 210, 235, 252, 282, 315, 329, 420, 423, 470, 564, 630, 658, 705, 846, 940, 987, 1260, 1316, 1381, 1410, 1645, 1692, 1974, 2115, 2762, 2820, 2961, 3290, 3948, 4143, 4230, 4935, 5524, 5922, 6580, 6905, 8286, 8460, 9667, 9870, 11844, 12429, 13810, 14805, 16572, 19334, 19740, 20715, 24858, 27620, 29001, 29610, 38668, 41430, 48335, 49716, 58002, 59220, 62145, 64907, 82860, 87003, 96670, 116004, 124290, 129814, 145005, 174006, 193340, 194721, 248580, 259628, 290010, 324535, 348012, 389442, 435015, 454349, 580020, 584163, 649070, 778884, 870030, 908698, 973605, 1168326, 1298140, 1363047, 1740060, 1817396, 1947210, 2271745, 2336652, 2726094, 2920815, 3894420, 4089141, 4543490, 5452188, 5841630, 6815235, 8178282, 9086980, 11683260, 13630470, 16356564, 20445705, 27260940, 40891410, 81782820]

約数ペア:

[(1, 81782820), (2, 40891410), (3, 27260940), (4, 20445705), (5, 16356564), (6, 13630470), (7, 11683260), (9, 9086980), (10, 8178282), (12, 6815235), (14, 5841630), (15, 5452188), (18, 4543490), (20, 4089141), (21, 3894420), (28, 2920815), (30, 2726094), (35, 2336652), (36, 2271745), (42, 1947210), (45, 1817396), (47, 1740060), (60, 1363047), (63, 1298140), (70, 1168326), (84, 973605), (90, 908698), (94, 870030), (105, 778884), (126, 649070), (140, 584163), (141, 580020), (180, 454349), (188, 435015), (210, 389442), (235, 348012), (252, 324535), (282, 290010), (315, 259628), (329, 248580), (420, 194721), (423, 193340), (470, 174006), (564, 145005), (630, 129814), (658, 124290), (705, 116004), (846, 96670), (940, 87003), (987, 82860), (1260, 64907), (1316, 62145), (1381, 59220), (1410, 58002), (1645, 49716), (1692, 48335), (1974, 41430), (2115, 38668), (2762, 29610), (2820, 29001), (2961, 27620), (3290, 24858), (3948, 20715), (4143, 19740), (4230, 19334), (4935, 16572), (5524, 14805), (5922, 13810), (6580, 12429), (6905, 11844), (8286, 9870), (8460, 9667)]