20921995416

素因数分解:

$2^3\times 3^1\times 7^1\times {\mathrm{887}}^1\times {\mathrm{140401}}^1$

素因数の和:141304

約数の個数: 64

約数和(自身を含む): 59844948480

約数和(自身を除く): 38922953064

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 21, 24, 28, 42, 56, 84, 168, 887, 1774, 2661, 3548, 5322, 6209, 7096, 10644, 12418, 18627, 21288, 24836, 37254, 49672, 74508, 140401, 149016, 280802, 421203, 561604, 842406, 982807, 1123208, 1684812, 1965614, 2948421, 3369624, 3931228, 5896842, 7862456, 11793684, 23587368, 124535687, 249071374, 373607061, 498142748, 747214122, 871749809, 996285496, 1494428244, 1743499618, 2615249427, 2988856488, 3486999236, 5230498854, 6973998472, 10460997708, 20921995416]

約数ペア:

[(1, 20921995416), (2, 10460997708), (3, 6973998472), (4, 5230498854), (6, 3486999236), (7, 2988856488), (8, 2615249427), (12, 1743499618), (14, 1494428244), (21, 996285496), (24, 871749809), (28, 747214122), (42, 498142748), (56, 373607061), (84, 249071374), (168, 124535687), (887, 23587368), (1774, 11793684), (2661, 7862456), (3548, 5896842), (5322, 3931228), (6209, 3369624), (7096, 2948421), (10644, 1965614), (12418, 1684812), (18627, 1123208), (21288, 982807), (24836, 842406), (37254, 561604), (49672, 421203), (74508, 280802), (140401, 149016)]