400000016

素因数分解:

$2^4\times {\mathrm{13}}^2\times {\mathrm{29}}^1\times {\mathrm{5101}}^1$

素因数の和:5164

約数の個数: 60

約数和(自身を含む): 868309380

約数和(自身を除く): 468309364

約数列:

[1, 2, 4, 8, 13, 16, 26, 29, 52, 58, 104, 116, 169, 208, 232, 338, 377, 464, 676, 754, 1352, 1508, 2704, 3016, 4901, 5101, 6032, 9802, 10202, 19604, 20404, 39208, 40808, 66313, 78416, 81616, 132626, 147929, 265252, 295858, 530504, 591716, 862069, 1061008, 1183432, 1724138, 1923077, 2366864, 3448276, 3846154, 6896552, 7692308, 13793104, 15384616, 25000001, 30769232, 50000002, 100000004, 200000008, 400000016]

約数ペア:

[(1, 400000016), (2, 200000008), (4, 100000004), (8, 50000002), (13, 30769232), (16, 25000001), (26, 15384616), (29, 13793104), (52, 7692308), (58, 6896552), (104, 3846154), (116, 3448276), (169, 2366864), (208, 1923077), (232, 1724138), (338, 1183432), (377, 1061008), (464, 862069), (676, 591716), (754, 530504), (1352, 295858), (1508, 265252), (2704, 147929), (3016, 132626), (4901, 81616), (5101, 78416), (6032, 66313), (9802, 40808), (10202, 39208), (19604, 20404)]