21581336

素因数分解:

$2^3\times 7^1\times {\mathrm{29}}^1\times {\mathrm{97}}^1\times {\mathrm{137}}^1$

素因数の和:276

約数の個数: 64

約数和(自身を含む): 48686400

約数和(自身を除く): 27105064

約数列:

[1, 2, 4, 7, 8, 14, 28, 29, 56, 58, 97, 116, 137, 194, 203, 232, 274, 388, 406, 548, 679, 776, 812, 959, 1096, 1358, 1624, 1918, 2716, 2813, 3836, 3973, 5432, 5626, 7672, 7946, 11252, 13289, 15892, 19691, 22504, 26578, 27811, 31784, 39382, 53156, 55622, 78764, 93023, 106312, 111244, 157528, 186046, 222488, 372092, 385381, 744184, 770762, 1541524, 2697667, 3083048, 5395334, 10790668, 21581336]

約数ペア:

[(1, 21581336), (2, 10790668), (4, 5395334), (7, 3083048), (8, 2697667), (14, 1541524), (28, 770762), (29, 744184), (56, 385381), (58, 372092), (97, 222488), (116, 186046), (137, 157528), (194, 111244), (203, 106312), (232, 93023), (274, 78764), (388, 55622), (406, 53156), (548, 39382), (679, 31784), (776, 27811), (812, 26578), (959, 22504), (1096, 19691), (1358, 15892), (1624, 13289), (1918, 11252), (2716, 7946), (2813, 7672), (3836, 5626), (3973, 5432)]