21261996

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{139}}^1\times {\mathrm{607}}^1$

素因数の和:763

約数の個数: 72

約数和(自身を含む): 61967360

約数和(自身を除く): 40705364

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, 139, 252, 278, 417, 556, 607, 834, 973, 1214, 1251, 1668, 1821, 1946, 2428, 2502, 2919, 3642, 3892, 4249, 5004, 5463, 5838, 7284, 8498, 8757, 10926, 11676, 12747, 16996, 17514, 21852, 25494, 35028, 38241, 50988, 76482, 84373, 152964, 168746, 253119, 337492, 506238, 590611, 759357, 1012476, 1181222, 1518714, 1771833, 2362444, 3037428, 3543666, 5315499, 7087332, 10630998, 21261996]

約数ペア:

[(1, 21261996), (2, 10630998), (3, 7087332), (4, 5315499), (6, 3543666), (7, 3037428), (9, 2362444), (12, 1771833), (14, 1518714), (18, 1181222), (21, 1012476), (28, 759357), (36, 590611), (42, 506238), (63, 337492), (84, 253119), (126, 168746), (139, 152964), (252, 84373), (278, 76482), (417, 50988), (556, 38241), (607, 35028), (834, 25494), (973, 21852), (1214, 17514), (1251, 16996), (1668, 12747), (1821, 11676), (1946, 10926), (2428, 8757), (2502, 8498), (2919, 7284), (3642, 5838), (3892, 5463), (4249, 5004)]