18721408

素因数分解:

$2^7\times {\mathrm{37}}^1\times {\mathrm{59}}^1\times {\mathrm{67}}^1$

素因数の和:177

約数の個数: 64

約数和(自身を含む): 39535200

約数和(自身を除く): 20813792

約数列:

[1, 2, 4, 8, 16, 32, 37, 59, 64, 67, 74, 118, 128, 134, 148, 236, 268, 296, 472, 536, 592, 944, 1072, 1184, 1888, 2144, 2183, 2368, 2479, 3776, 3953, 4288, 4366, 4736, 4958, 7552, 7906, 8576, 8732, 9916, 15812, 17464, 19832, 31624, 34928, 39664, 63248, 69856, 79328, 126496, 139712, 146261, 158656, 252992, 279424, 292522, 317312, 505984, 585044, 1170088, 2340176, 4680352, 9360704, 18721408]

約数ペア:

[(1, 18721408), (2, 9360704), (4, 4680352), (8, 2340176), (16, 1170088), (32, 585044), (37, 505984), (59, 317312), (64, 292522), (67, 279424), (74, 252992), (118, 158656), (128, 146261), (134, 139712), (148, 126496), (236, 79328), (268, 69856), (296, 63248), (472, 39664), (536, 34928), (592, 31624), (944, 19832), (1072, 17464), (1184, 15812), (1888, 9916), (2144, 8732), (2183, 8576), (2368, 7906), (2479, 7552), (3776, 4958), (3953, 4736), (4288, 4366)]