21591738

素因数分解:

$2^1\times 3^3\times 7^1\times {\mathrm{239}}^2$

素因数の和:496

約数の個数: 48

約数和(自身を含む): 55066560

約数和(自身を除く): 33474822

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 54, 63, 126, 189, 239, 378, 478, 717, 1434, 1673, 2151, 3346, 4302, 5019, 6453, 10038, 12906, 15057, 30114, 45171, 57121, 90342, 114242, 171363, 342726, 399847, 514089, 799694, 1028178, 1199541, 1542267, 2399082, 3084534, 3598623, 7197246, 10795869, 21591738]

約数ペア:

[(1, 21591738), (2, 10795869), (3, 7197246), (6, 3598623), (7, 3084534), (9, 2399082), (14, 1542267), (18, 1199541), (21, 1028178), (27, 799694), (42, 514089), (54, 399847), (63, 342726), (126, 171363), (189, 114242), (239, 90342), (378, 57121), (478, 45171), (717, 30114), (1434, 15057), (1673, 12906), (2151, 10038), (3346, 6453), (4302, 5019)]