21265712

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{5381}}^1$

素因数の和:5421

約数の個数: 40

約数和(自身を含む): 46715760

約数和(自身を除く): 25450048

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 38, 52, 76, 104, 152, 208, 247, 304, 494, 988, 1976, 3952, 5381, 10762, 21524, 43048, 69953, 86096, 102239, 139906, 204478, 279812, 408956, 559624, 817912, 1119248, 1329107, 1635824, 2658214, 5316428, 10632856, 21265712]

約数ペア:

[(1, 21265712), (2, 10632856), (4, 5316428), (8, 2658214), (13, 1635824), (16, 1329107), (19, 1119248), (26, 817912), (38, 559624), (52, 408956), (76, 279812), (104, 204478), (152, 139906), (208, 102239), (247, 86096), (304, 69953), (494, 43048), (988, 21524), (1976, 10762), (3952, 5381)]