21663558

素因数分解:

$2^1\times 3^3\times 7^1\times {\mathrm{223}}^1\times {\mathrm{257}}^1$

素因数の和:498

約数の個数: 64

約数和(自身を含む): 55480320

約数和(自身を除く): 33816762

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 54, 63, 126, 189, 223, 257, 378, 446, 514, 669, 771, 1338, 1542, 1561, 1799, 2007, 2313, 3122, 3598, 4014, 4626, 4683, 5397, 6021, 6939, 9366, 10794, 12042, 13878, 14049, 16191, 28098, 32382, 42147, 48573, 57311, 84294, 97146, 114622, 171933, 343866, 401177, 515799, 802354, 1031598, 1203531, 1547397, 2407062, 3094794, 3610593, 7221186, 10831779, 21663558]

約数ペア:

[(1, 21663558), (2, 10831779), (3, 7221186), (6, 3610593), (7, 3094794), (9, 2407062), (14, 1547397), (18, 1203531), (21, 1031598), (27, 802354), (42, 515799), (54, 401177), (63, 343866), (126, 171933), (189, 114622), (223, 97146), (257, 84294), (378, 57311), (446, 48573), (514, 42147), (669, 32382), (771, 28098), (1338, 16191), (1542, 14049), (1561, 13878), (1799, 12042), (2007, 10794), (2313, 9366), (3122, 6939), (3598, 6021), (4014, 5397), (4626, 4683)]