21557888

素因数分解:

$2^7\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{251}}^1$

素因数の和:337

約数の個数: 64

約数和(自身を含む): 47809440

約数和(自身を除く): 26251552

約数列:

[1, 2, 4, 8, 11, 16, 22, 32, 44, 61, 64, 88, 122, 128, 176, 244, 251, 352, 488, 502, 671, 704, 976, 1004, 1342, 1408, 1952, 2008, 2684, 2761, 3904, 4016, 5368, 5522, 7808, 8032, 10736, 11044, 15311, 16064, 21472, 22088, 30622, 32128, 42944, 44176, 61244, 85888, 88352, 122488, 168421, 176704, 244976, 336842, 353408, 489952, 673684, 979904, 1347368, 1959808, 2694736, 5389472, 10778944, 21557888]

約数ペア:

[(1, 21557888), (2, 10778944), (4, 5389472), (8, 2694736), (11, 1959808), (16, 1347368), (22, 979904), (32, 673684), (44, 489952), (61, 353408), (64, 336842), (88, 244976), (122, 176704), (128, 168421), (176, 122488), (244, 88352), (251, 85888), (352, 61244), (488, 44176), (502, 42944), (671, 32128), (704, 30622), (976, 22088), (1004, 21472), (1342, 16064), (1408, 15311), (1952, 11044), (2008, 10736), (2684, 8032), (2761, 7808), (3904, 5522), (4016, 5368)]