21420938

素因数分解:

$2^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{641}}^1$

素因数の和:699

約数の個数: 48

約数和(自身を含む): 42156288

約数和(自身を除く): 20735350

約数列:

[1, 2, 7, 11, 14, 22, 31, 49, 62, 77, 98, 154, 217, 341, 434, 539, 641, 682, 1078, 1282, 1519, 2387, 3038, 4487, 4774, 7051, 8974, 14102, 16709, 19871, 31409, 33418, 39742, 49357, 62818, 98714, 139097, 218581, 278194, 345499, 437162, 690998, 973679, 1530067, 1947358, 3060134, 10710469, 21420938]

約数ペア:

[(1, 21420938), (2, 10710469), (7, 3060134), (11, 1947358), (14, 1530067), (22, 973679), (31, 690998), (49, 437162), (62, 345499), (77, 278194), (98, 218581), (154, 139097), (217, 98714), (341, 62818), (434, 49357), (539, 39742), (641, 33418), (682, 31409), (1078, 19871), (1282, 16709), (1519, 14102), (2387, 8974), (3038, 7051), (4487, 4774)]